Discover 85+ Animals Beginning with B: Classified Lists with Pictures and Fun Fact

Most Popular Animals Start With B

The animal kingdom is brimming with wonders, and animals starting with the letter “B” are no exception. From the bold bison to the beautiful bluebird, these creatures showcase nature’s diversity and charm.

Bear	Buffalo	Badgers
Bat	Bald Eagle	Beaver
Boar	Bandicoot	Butterfly
Beetle	Badger	Butterfly Fish
Bee	Binturong	Bison
Blue Whale

1. Bear

Bears (Ursidae) are iconic mammals found across the globe, inhabiting a wide range of habitats from dense forests to Arctic tundra. Depending on the species, they measure between 4–9 ft (1.2–2.8 m) in length and weigh from 220–3,300 lbs (100–1,500 kg).

Characterized by their large bodies, stocky build, plantigrade posture, and non-retractable claws, bears are primarily omnivorous, with diets consisting of vegetation, fruits, insects, fish, and occasionally small mammals. After a gestation period of about 6 to 9 months, females typically give birth to 1–3 cubs, which they nurse and protect until they are old enough to survive independently.

Fun fact: African Buffalo are nicknamed “Black Death” due to their fierce defense tactics, capable of warding off even lions with their powerful horns and muscular bodies!

3. Badgers

Badgers, members of the Mustelidae family, are sturdy, burrowing mammals found across North America, Europe, Asia, and Africa. Ranging from 20–33 inches (50–85 cm) in length and weighing 15–35 pounds (7–16 kilograms), they vary by species, such as the striped-face European Badger (Meles meles), solitary American Badger (Taxidea taxus), and fierce Honey Badger (Mellivora capensis). They inhabit forests, grasslands, and urban areas, living in underground burrows called setts.

Omnivorous, badgers feed on earthworms, insects, fruits, small mammals, and bird eggs, adapting to seasonal food availability. Nocturnal by nature, they forage at night and return to their setts by dawn. While some, like the European Badger, form social clans, others, like the American Badger, are solitary. Females give birth to 2–5 cubs after delayed implantation, raising them in the sett until weaning at 8–12 weeks.

Fun fact: Badgers are remarkably strong for their size and can fend off larger predators like wolves or bears with their powerful claws and fearless attitude!

4. Bat

Bats, the only mammals capable of sustained flight, belong to the order Chiroptera, which includes megabats and microbats. Their size varies from the tiny bumblebee bat, with a 5–6 inch (13–15 cm) wingspan and weighing just 0.1 ounces (2.5 grams), to flying foxes with a wingspan of up to 5.5 feet (1.7 meters) and weighing 3.3 pounds (1.5 kilograms). Found worldwide except in extreme polar regions, bats roost in caves, trees, urban structures, and even bridges.

Their diets are diverse: insectivorous bats control pests, frugivorous bats aid seed dispersal, nectar-feeders pollinate plants, and some species eat fish or small animals. Vampire bats consume small amounts of blood. Nocturnal and highly social, bats use echolocation (microbats) or keen vision and smell (megabats) to navigate and forage. Mothers care for 1–2 pups, often in communal nurseries, while colonies range from solitary to millions of individuals.

Fun fact: Some bats can eat up to 1,000 insects per hour, playing a crucial role in pest control and ecosystem health!

5. Bald Eagle

The Bald Eagle (Haliaeetus leucocephalus) is a majestic bird of prey and the national symbol of the United States. With its distinctive white head and tail contrasting against a dark brown body, the bald eagle is instantly recognizable.  Their impressive wingspan, reaching up to 7 feet (2.1 meters), allows them to soar effortlessly through the sky, showcasing their prowess as apex predators. Bald eagles are formidable hunters, primarily feeding on fish but also preying on birds, mammals, and carrion when available.

Fun fact: Bald eagles actually have white-feathered heads, a feature that becomes more prominent as they mature, contrasting sharply with their dark plumage.

6. Beaver

The Beaver (Castor canadensis) is a large semi-aquatic rodent native to North America, Europe, and Asia, distinguished by its prominent front teeth and exceptional engineering abilities. Measuring approximately 30–35 inches (75–90 cm) in length and weighing between 30–70 pounds (14–32 kg), beavers possess strong, stocky bodies with webbed feet for efficient swimming and a flat, paddle-shaped tail for balance and signaling.

Primarily herbivorous, beavers feed on bark, leaves, and aquatic plants from trees such as aspen, willow, and poplar. Social and family-oriented, they live in colonies typically consisting of a dominant pair and their offspring. Females give birth to 1–4 kits after a gestation period of about six months.

Fun fact: Beavers possess a unique adaptation that allows them to close their ears and nostrils while underwater.

7. Boar

The Boar (Sus scrofa) is a robust species of pig native to Eurasia, North Africa, and parts of the Indonesian islands. Characterized by their sturdy build, bristly coat, and distinctive tusks, boars are highly adaptable omnivores that thrive in diverse habitats ranging from dense forests and grasslands to agricultural areas and even urban environments.

Typically measuring 3–4 feet (90–120 cm) in length and weighing between 150–300 pounds (70–140 kg), these mammals have a varied diet that includes roots, fruits, nuts, insects, small mammals, and carrion. During the breeding season, dominant males compete for access to females. After a gestation period of approximately 115 days, sows give birth to 4–6 piglets, which they nurse and protect diligently.

Fun fact: Male boars, known as boars or tuskers, are known for their impressive tusks, which can grow up to several inches in length and are used for defense, digging, and weapons.

8. Bandicoot

Bandicoots (Perameles Genus) are small to medium-sized marsupials native to Australia, characterized by their long, pointed snouts and adept digging abilities. Typically measuring 11–18 inches (28–45 cm) in body length and weighing 1–3 pounds (0.5–1.4 kg), they forage at night for insects, small vertebrates, seeds, and roots.

Using strong forelimbs and sharp claws, bandicoots excavate burrows for daytime shelter and nesting. Females have a pouch opening toward the rear, allowing them to safely carry and nurse their young after an exceptionally short gestation—often fewer than 15 days. The joeys remain in the pouch until they can venture out independently, relying on maternal protection and nourishment during early development.

Fun fact: Bandicoots belong to the order Peramelemorphia, which is derived from the Greek words “perameles” meaning “pouched” and “morphe” meaning “form.”

9. Butterfly

Butterflies (Order Lepidoptera), among the most recognizable insects, range in wingspan from about 0.5 to 12 inches (1–30 cm) and generally weigh less than 1 gram, thriving worldwide in habitats from tropical forests to open meadows. Belonging to the order Lepidoptera (which also includes moths), they are identified by club-tipped antennae, slender bodies, and vividly colored, scale-covered wings.

Feeding primarily on nectar, butterflies assist in pollination as they move between flowers. Undergoing complete metamorphosis, they start as eggs on host plants, hatch into caterpillars that molt several times, form pupae (chrysalises), and finally emerge as adults.

Fun fact: The monarch butterfly undertakes remarkable migrations spanning thousands of miles, navigating across continents to reach their overwintering grounds.

10. Beetle

Beetles belong to the order Coleoptera, the largest order in the animal kingdom, encompassing over 360,000 known species according to Britannica. These insects typically range in size from 0.04–6.7 in (1–170 mm) in length and weigh between 0.1–5 grams, depending on the species. Beetles are easily identifiable by their hard exoskeletons, particularly the elytra—hardened forewings that protect their delicate hindwings used for flight.

They play essential roles in ecosystems as decomposers, breaking down dead organic matter; as predators, controlling populations of other insects; as herbivores, feeding on plants; and as pollinators, facilitating the reproduction of flowering plants.

Fun fact: The bombardier beetle produces a noxious chemical spray when threatened, one of the most remarkable examples of chemical defense in the animal kingdom.

11. Badger

The Badger (Meles meles) is a stout, burrowing mammal found across Europe, Asia, and parts of North America, easily recognized by its black-and-white facial markings and powerful digging claws. Measuring 25–33 inches (65–85 cm) in body length and weighing 15–35 pounds (7–16 kg), it inhabits diverse environments, from forests and grasslands to urban areas.

The badger feeds on earthworms, insects, small mammals, fruits, and roots. After a gestation of 7–8 weeks, females typically give birth to 2–5 cubs in underground setts, where the young remain until they can venture out to forage.

Fun fact: Strong forelimbs and sharp claws that allow them to excavate extensive underground burrow systems called setts.

12. ButterflyFish

Butterflyfish (Chaetodontidae) are a diverse and vibrant group of marine fish species found in tropical and subtropical waters worldwide. Measuring typically between 4–8 inches (10–20 cm) in length and weighing up to 0.66 pounds (300 grams), these fish are renowned for their colorful and ornate patterns that resemble butterfly wings, featuring striking combinations of yellows, blues, blacks, and whites.

Characterized by their laterally compressed bodies, elongated dorsal and anal fins, and small mouths adapted for specialized feeding, butterflyfish primarily consume coral polyps, small invertebrates, and algae. Their intricate coloration and patterns not only provide effective camouflage among the coral structures but also play a vital role in species recognition and mating displays.

Fun fact: Butterflyfish form monogamous pairs and exhibit elaborate courtship rituals, including coordinated swimming and displays of affection to strengthen their bond and defend their territory.

13. Bee

Bees are a diverse group of insects belonging to the family Apidae within the order Hymenoptera. Typically measuring 0.08–1.6 in (2–40 mm) in length and weighing 0.1–0.3 grams, bees possess a specialized proboscis used to extract nectar from flowers for energy and to produce honey. Bees live in organized colonies with distinct roles, including queens, workers, and drones, which contribute to their efficiency and success as vital contributors to both natural ecosystems and human agriculture.

Fun fact: Bees communication includes intricate dances known as “waggle dances,” which convey information about the location of food sources to other members of the colony.

14. Binturong

The Binturong (Arctictis binturong) is a unique mammal native to the dense forests of Southeast Asia, including countries such as Malaysia, Thailand, and Indonesia. Adults typically measure 22–37 in (57–94 cm) in body length and weigh between 20–33 in (50–84 cm). They are characterized by their long, shaggy black fur and a prehensile tail, which they use for balance and maneuvering through the trees.

Binturongs spend much of their time in the canopy, where they feed on a varied diet of fruits, leaves, and small animals like birds and insects. During the breeding season, females give birth to 1–3 offspring, which are nursed and cared for until they are old enough to explore their environment independently, ensuring the continuation of their species in the challenging forest habitats they inhabit.

Fun fact: Binturongs have a distinctive musky odor, which is often compared to that of buttered popcorn.

15. Bison

Bison are fascinating creatures from the Bovidae family. The American bison (Bison bison) and European bison (Bison bonasus) thrive in temperate grasslands and prairies across North America and Europe. These giants stand 1.5–2 meters tall at the shoulder and weigh up to 1,000 kilograms.

Their thick, shaggy coat keeps them warm in harsh winters, and their short, curved horns are handy for defense. Herding animals by nature, females and calves form groups, while males may roam solo or join bachelor herds. Bison spend hours grazing on grasses and sedges, using their strong heads to clear snow in winter.

Fun fact: Despite their massive size, bison are incredibly fast, reaching speeds up to 56 km/h! That’s faster than most humans can sprint!

16. Blue Whale

The Blue Whale (Balaenoptera musculus) holds the distinction of being the largest animal ever to have lived on Earth. These magnificent marine mammals can reach lengths of up to 100 feet (30 meters) and weigh as much as 200 tons.

Blue whales are characterized by their sleek, streamlined bodies and mottled blue-gray coloration, with lighter undersides. Despite their enormous size, blue whales feed primarily on tiny shrimp-like creatures called krill, which they filter through baleen plates in their mouths while engulfing large volumes of water.

Fun fact: The heart of a blue whale is the largest of any animal, weighing as much as a small car and pumping approximately 10 tons of blood throughout its massive body.

Now that we’ve seen the wide variety of popular animals beginning with ‘B,’ let’s take a closer look at mammals. These warm-blooded animals captivate with their adaptability and charisma.

Mammals that start with B

Mammals that start with ‘B,’ like the bison, brown bear, and baboon, exhibit remarkable traits, from resilience in harsh climates to social intelligence and powerful physiques.

Baboon	Bactrian Camel	Bagworm Moth
Bush Baby	Bobcat	Black Bear
Boa Constrictor	Bamboo Rat	Brown Bear
Beluga Whale	Bush Dog	Babirusa
Baleen Whale	Bengal Tiger	Bonobo
Black Rhino	Black-Footed Ferret	Balkan LynxBaboon

17. Baboon

Baboons (Papio Genus), large ground-dwelling monkeys native to sub-Saharan Africa and the Arabian Peninsula, measure 20–45 inches (50–115 cm) in body length and weigh 30–90 pounds (14–41 kg). Known for their dog-like snout, robust build, and long, downward-curving tails, they thrive in savannas, woodlands, and mountainous areas.

Omnivorous by nature, baboons feed on fruits, seeds, insects, and occasionally small mammals. After a gestation of about six months, females usually bear a single infant, which they rear within the protective troop environment.

Fun fact: During mating season, females use their hindquarters to communicate with potential partners.

18. Bactrian Camel

The Bactrian Camel (Camelus bactrianus) is a large, even-toed ungulate native to the steppes of Central Asia, standing 5.9–7.2 feet (1.8–2.2 m) at the shoulder and weighing 660–1,540 pounds (300–700 kg). Easily recognized by its two humps, shaggy coat, and long, curved neck, it is superbly adapted to harsh desert and mountain conditions.

The camel feeds on sparse vegetation like grasses and shrubs, relying on fat stored in its humps to survive prolonged periods without food or water. After a gestation of about 13 months, females typically bear a single calf, which they nurse for up to a year, ensuring the young camel’s survival in these unforgiving environments.

Fun fact: Bactrian camels have remarkable adaptations for conserving water, including the ability to go for weeks without drinking and the capacity to consume thorny.

19. Bagworm Moth

The Bagworm Moth (Psychidae) is a distinctive insect found worldwide, recognized for the protective bag-like cases its larvae construct from silk and camouflage with twigs, leaves, and other debris. Measuring 0.2–1 inch (5–25 mm)in length, they undergo complete metamorphosis: the larvae live inside their self-built bags, feeding on foliage until pupation.

Adult males emerge with wings, while many females remain wingless, reproducing and laying 200–1,000 eggs in the same bag. Once hatched, the new larvae continue this characteristic case-building cycle, showcasing a remarkable adaptation against predation and environmental challenges.

Fun fact: Bagworm moth caterpillars are particularly adept at constructing intricate and durable bags, showcasing impressive craftsmanship in their natural habitat.

20. Bush Baby

The Bush Baby is a small, nocturnal primate native to the dense forests and woodlands of sub-Saharan Africa. Measuring typically 6–10 inches (15–25 cm) in body length with a tail length of 8–12 inches (20–30 cm) and weighing between 3.5–7 ounces (100–200 grams), Bush Babies are excellent climbers, spending most of their time navigating the canopy in search of food.

Their diet consists mainly of insects, tree gum, fruits, and other plant matter. During the breeding season, females give birth to a single offspring after a gestation period of about 110 days, with the young being carried on the mother’s belly and weaned after several months.

Fun fact: They can leap up to 20 feet (6 meters) in a single bound, thanks to their powerful hind limbs and specialized adaptations for gripping branches.

21. Bobcat

Bobcat (Lynx rufus) is a small to medium-sized wildcat native to North America, measuring 18–49 inches (46–125 cm) in length and weighing between 11–30 kg (24–66 lbs). Recognized by its distinctive tufted ears, spotted coat, and short, bobbed tail, the bobcat is highly adaptable, thriving in diverse habitats such as forests, deserts, and grasslands.

Bobcats primarily hunt small mammals and birds, and occasionally prey on deer. During the breeding season, females give birth to 1–6 kittens after a gestation period of approximately 60 days. The mother solely cares for her young, providing them with nourishment and protection until they are old enough to fend for themselves.

Fun fact: Bobcats are skilled climbers and swimmers, capable of scaling trees and crossing rivers to pursue prey or escape danger.

22. Black Bear (American)

The American Black Bear (Ursus americanus) is a widely distributed bear species native to North America. They typically measure 4 to 6 feet (1.2–1.8 meters) in length and weigh between 100–600 pounds (45–270 kg). Known for their distinctive black fur, some individuals may exhibit color variations including brown, cinnamon, or even white, particularly in specific geographic populations.

American Black Bears have a diverse diet that includes berries, nuts, insects, small mammals, and occasionally carrion. After a gestation period of about 6 months, females typically give birth to 1–3 cubs, providing extensive parental care by nursing and protecting them until they are old enough to fend for themselves.

Fun fact: American Black Bears are excellent climbers and are often observed ascending trees to forage for food or to escape perceived threats.

23. Boa Constrictor

The Boa Constrictor (Boa constrictor) is a large, non-venomous snake native to Central and South America, renowned for its impressive size, muscular build, and distinctive hunting technique. Typically measuring 6–13 feet (1.8–4 meters) in length and weighing up to 100 pounds (45 kilograms), they possess robust bodies with patterned scales and heat-sensitive pits along their jaws, aiding in locating prey in low-light conditions.

As ambush predators, Boa Constrictors rely on stealth and patience to capture their targets.  Females give birth to live young, typically 10–20 offspring, which are independent from birth and require no parental care.

Fun fact: Boa constrictors are capable of consuming prey much larger than their heads by dislocating their jaws and stretching their flexible skin.

24. Bamboo Rat

The Bamboo Rat (Cannomys badius) is a large, burrowing rodent native to Southeast Asia. Measuring approximately 12–16 inches (30–40 cm) in body length and weighing between 3.3–6.6 pounds (1.5–3 kg), these nocturnal creatures are characterized by their robust build, long claws adapted for digging, and short, furry tails.

Their coarse brown to gray fur helps them blend seamlessly into bamboo-rich habitats. Bamboo Rats feed on bamboo shoots, roots, and other plant matter, using their powerful jaws to gnaw through tough vegetation. They construct elaborate burrow systems that provide shelter from predators and extreme weather conditions.

Fun fact: Bamboo Rats play a crucial ecological role in their habitats by helping to disperse seeds and aerate the soil through their burrowing activities,.

25. Brown Bear

The Brown Bear (Ursus arctos) is a large carnivorous mammal native to North America, Europe, and Asia. Distinguished by their massive size, humped shoulders, and prominent shoulder hump, brown bears exhibit color variations ranging from light tan to dark brown and even black in some populations.

Typically measuring 6–9 feet (1.8–2.7 meters) in length and weighing between 200–600 kilograms (440–1,320 pounds), Brown bears have a varied diet that includes vegetation, berries, insects, and fish.  During the breeding season, females give birth to 1–4 cubs after a gestation period of about seven months, usually in dens dug into the ground.

Fun fact: Brown bears are known for their exceptional sense of smell, which is estimated to be seven times more sensitive than that of a bloodhound.

26. Beluga Whale

The Beluga Whale (Delphinapterus leucas) is a distinctive marine mammal native to the Arctic and sub-Arctic regions. Measuring between 15–18 feet (4.5–5.5 meters) in length and weighing approximately 2,425–3,530 pounds (1,100–1,600 kilograms), belugas are easily recognizable by their striking white coloration and rounded, melon-shaped heads, which aid in echolocation.

As opportunistic feeders, they consume a diverse diet that includes fish, squid, crustaceans, and other small marine organisms found in their icy habitats. They play a crucial role in the Arctic ecosystem by maintaining healthy fish populations and serving as indicators of environmental changes. Reproduction occurs annually, with females giving birth to a single calf after a gestation period of about 14–15 months.

Fun fact: Beluga whales are known for their remarkable vocal abilities and can produce an array of sounds, including clicks, whistles, and chirps.

27. Bush Dog

The Bush Dog (Speothos venaticus) is a rare and elusive canid native to the dense forests and grasslands of Central and South America. Measuring approximately 18–24 inches (45–60 cm) in body length and weighing between 9–20 pounds (4–9 kg), they are distinguished by their short, reddish-brown fur, short legs, and stout, bear-like build.

Bush Dogs live in small family groups of up to 10 individuals, where they collaborate in hunting to capture small prey such as rodents, birds, and reptiles. These canids are known for their cooperative breeding behaviors, with family members assisting in raising the young.

Fun fact: Bush Dogs are one of the few canid species that are semi-aquatic, often found near streams, rivers, and marshes in their native habitats.

28. Babirusa

The Babirusa (Babyrousa babyrussa), originating on the Indonesian islands of Sulawesi, Togian, Sula, and Buru, is a remarkable wild pig recognized by its long, upward-curving tusks protruding from the upper jaw. Covered in short, coarse hair ranging from gray to brown, these herbivores primarily feed on fruits, leaves, and roots in the dense forests they inhabit.

Typically measuring up to 3.6 feet (1.1 m) in length and weighing up to 220 pounds (100 kg), best suited to undisturbed forest environments, they rely on ample vegetation and minimal interference to thrive.

Fun fact: The name “Babirusa” is derived from the Malay word meaning “pig-deer,” owing to its unique tusk configuration and slender legs reminiscent of a deer.

29. Baleen Whale

Baleen whales (Mysticeti family) are a diverse group of large marine mammals renowned for their baleen plates, which they use to filter small fish, krill, and plankton from the water. This group includes some of the largest animals on Earth, such as the blue whale (Balaenoptera musculus), which can reach lengths of up to 30 meters (98 feet) and weigh as much as 180 metric tons, and the humpback whale (Megaptera novaeangliae), typically measuring 39–98 ft (12–30 m) in length and weighing between 25–40 metric tons.

The Baleen whales are known for their extensive migrations between feeding and breeding grounds, traveling thousands of miles each year to exploit rich feeding areas during the summer and to breed in warmer waters during the winter. Their baleen plates enable them to consume vast quantities of small prey efficiently, supporting their massive size and energy needs. Reproduction involves lengthy gestation periods, with females giving birth to a single calf after 10–12 months of gestation, depending on the species.

Fun fact: The blue whale, a species of baleen whale, holds the title of being the largest animal ever to have lived on Earth (lengths of up to 100 feet and weigh as much as 200 tons).

30. Bengal Tiger

The Bengal Tiger (Panthera tigris tigris) is a majestic big cat native to the Indian subcontinent and belongs to the family Felidae. Males typically measure 9–10 feet (2.7–3 meters) in length and weigh between 400–570 pounds (180–260 kilograms), while females are slightly smaller, measuring 8–9 feet (2.4–2.7 meters) and weighing 220–350 pounds (100–160 kilograms).

As omnivores, Bengal tigers primarily prey on large herbivores such as deer, wild boar, and buffalo, utilizing their strength, speed, and agility to ambush and overpower their targets. During the breeding season, females give birth to 2–4 cubs after a gestation period of approximately 104 days. The mother solely cares for her cubs, nursing them for the first few months and teaching them vital survival skills until they are ready to become independent.

Fun fact: Bengal tigers are excellent swimmers and are known to traverse rivers and lakes in search of prey.

31. Bonobo

The Bonobo (Pan paniscus) is a species of great ape native to the dense rainforests of the Democratic Republic of the Congo in Central Africa. Closely related to chimpanzees, bonobos are distinguished by their slender build, long limbs, and relatively hairless faces.

Adults typically measure 28–33 inches (70–85 cm) in height and weigh between 66–132 pounds (30–60 kg). Renowned for their peaceful and egalitarian social structure, bonobos resolve conflicts through social bonding, empathy, and sexual behaviors, fostering strong community ties. During the breeding season, females give birth to a single infant after a gestation period of approximately 8 months, which they nurse for about 2 years.

Fun fact: Bonobos are unique among primates for their extensive use of sexual behavior as a means of conflict resolution, social bonding, and tension reduction.

32. Black Rhino

The Black Rhino (Diceros bicornis) is a large herbivorous mammal native to eastern and southern Africa. Males typically measure 11–14 feet (3.3–4.3 meters) in length and weigh between 1,800–3,100 pounds (800–1,400 kg), while females are slightly smaller, measuring 9–11 feet (2.7–3.3 meters) and weighing 1,300–2,000 pounds (600–900 kg).

Black rhinos also possess thick, armored skin and two prominent keratin horns used for defense and dominance displays. Their coloration ranges from gray to brown, providing effective camouflage in their natural habitats. During the breeding season, females give birth to a single calf after a gestation period of about 15–16 months, nursing and protecting their young until it is old enough to fend for itself.

Fun fact: Despite their large size, black rhinos can reach speeds of up to 35 miles per hour (56 kilometers per hour) when charging.

33. Black-Footed Ferret

The Black-Footed Ferret (Mustela nigripes) is a rare and critically endangered mammal native to North America. Measuring 15–20 inches (38–51 cm) in length and weighing between 2–4 pounds (0.9–1.8 kg), these slender, nocturnal ferrets are distinguished by their distinctive black mask, dark feet, and long, streamlined bodies.

Black-Footed Ferrets rely almost exclusively on prairie dogs for both food and shelter, hunting these rodents by stalking and ambushing them within their burrows. During the breeding season, females give birth to litters of 1–5 kits after a gestation period of approximately 42 days, providing exclusive care and protection until the young are mature enough to fend for themselves.

Fun fact: Black-Footed Ferrets are solitary animals except during the breeding season, where they come together in small groups.

34. Balkan Lynx

The Balkan Lynx (Lynx lynx balcanicus) is a critically endangered subspecies of the Eurasian Lynx native to the mountainous regions of the Balkans in Southeastern Europe. Measuring approximately 24–35 inches (60–90 cm) in body length and weighing between 26–44 lb (12–20 kg) for females and 18–30 kg (40–66 lbs) for males, these elusive and solitary cats are characterized by their tufted ears, long legs, and distinctive spotted coat, which provides effective camouflage within their dense forested habitats.

Balkan Lynxes are skilled hunters, preying on small to medium-sized mammals such as deer, rabbits, and rodents. Socially, they are solitary except during the breeding season, where males and females may come together to mate.

Fun fact: The Balkan lynx primarily uses its ears for communication.

As we move from mammals to reptiles, we encounter cold-blooded species beginning with ‘B.’ These animals offer insight into survival strategies in various habitats.

Reptiles that start with B

Reptiles such as the boa constrictor and box turtle demonstrate fascinating traits, like the ability to regulate their temperature and unique hunting or defensive behaviors.

Black Mamba	Banded Water Snake	Boas
Basilisk Lizard	Bush Viper	Blind Snake
Banded Krait	Burmese Python

35. Black Mamba

The Black Mamba (Dendroaspis polylepis) is one of the world’s deadliest and fastest snakes, native to the savannas, rocky hills, and woodlands of sub-Saharan Africa. Typically reaching lengths of 8.2–9.8 feet (2.5–3 meters) and weighing around 2.2–3.3 lb (1–1.5 kg), the Black Mamba is characterized by its sleek, slender body and remarkable agility.

Contrary to its name, its coloration varies from olive to gray, with a distinctive dark mouth lining that appears black when threatened. It hunts small mammals, birds, and occasionally reptiles, employing its keen senses and quick strikes to capture prey efficiently. Reproduction involves laying clutches of 6–17 eggs in secure nests, which hatch after an incubation period of approximately two months.

Fun fact: Black Mamba’s name does not originate from the color of its scales but rather from the black interior of its mouth, which it displays as a warning when feeling threatened.

36. Banded Water Snake

The Banded Water Snake (Nerodia fasciata) is a non-venomous snake species native to the southeastern United States. Measuring typically between 24–35 inches (60–90 cm) in length and weighing up to 3.3 lb (1.5 kg), these snakes possess slender, muscular bodies adorned with distinctive dark crossbands against a lighter background, providing effective camouflage in their aquatic environments.

Banded Water Snakes rely on their strong swimming abilities to pursue prey, which primarily consists of fish, amphibians, and aquatic invertebrates like crayfish and frogs. They are also known to occasionally consume small mammals and birds. Reproduction involves males competing for females, and females typically lay a clutch of 10–20 eggs in moist, hidden locations near water sources.

Fun fact: Banded Water Snakes are often mistaken for venomous water moccasins (cottonmouths) due to their similar appearance and habitat preferences.

37. Boas

Boas are a diverse family of non-venomous snakes found across North, Central, and South America, Africa, Asia, and some Pacific islands. Characterized by their stout, muscular bodies and distinctive heat-sensing pits on their faces, boas are adept constrictors that kill their prey by wrapping around and suffocating them.

They exhibit a remarkable size range, from small species like sand boas measuring less than a foot to the massive green anacondas, which can exceed 20 feet in length and weigh several hundred pounds. Boas feed on a variety of prey including mammals, birds, and reptiles, utilizing their excellent sense of smell and strength to capture and overpower their targets. Reproduction in boas is typically ovoviviparous, with females giving birth to live young after internal egg development.

Fun fact: Boas are viviparous, meaning they give birth to live young rather than laying eggs.

38. Basilisk Lizard

The Basilisk Lizard (Basiliscus basiliscus), native to the tropical rainforests of Central and South America, is renowned for its extraordinary ability to run across water surfaces, earning it the nickname “Jesus Christ Lizard.” Measuring up to 4 feet (1.2 meters) in total length, these lizards possess specialized feet with fringed toes and long hind limbs that exploit surface tension, enabling them to dash across bodies of water to escape predators.

Their vibrant green or brown plumage provides effective camouflage among the lush vegetation, while their striking coloration is both a display trait and a means of blending into their arboreal habitats. Their diet is diverse, consisting primarily of insects, small vertebrates, and plant matter.

Fun fact: Basilisks can stay underwater for more than 10 minutes at a time.

39. Bush Viper

The Bush Viper (Atheris spp.) is a venomous snake native to the dense, forested regions of sub-Saharan Africa. These strikingly colored snakes typically measure between 2–3 feet (60–90 cm) in length and weigh up to 2.2 lb (1 kg). They are easily recognizable by their characteristic triangular-shaped heads and keeled scales, which provide excellent camouflage amidst the lush foliage of their environments.

Exhibiting a wide range of color variations—including vibrant shades of green, yellow, brown, and even purple—Bush Vipers blend seamlessly into their surroundings, allowing them to ambush prey with stealth and precision. Bush Vipers feed on a diverse diet of small vertebrates such as rodents, birds, amphibians, and lizards. Reproduction in Bush Vipers is viviparous, with females giving birth to live young after a gestation period of several months, enabling the juveniles to be more developed and capable of survival upon birth.

Fun fact: No antivenom exists for the Bush Viper.

40. Blind Snake

The Blind Snake (Indotyphlops braminus), also known as the Brahminy Blind Snake or flowerpot snake, is a small, legless reptile belonging to the family Typhlopidae. These burrowing snakes are found worldwide, inhabiting a variety of environments including tropical and subtropical regions. Measuring typically between 4–6 in (10–15 cm) in length and weighing less than 0.35 oz (10 g), Blind Snakes possess slender, cylindrical bodies covered with smooth, shiny scales and extremely reduced eyes that are covered by scales, rendering them nearly blind.

Instead of relying on vision, they depend heavily on other senses such as touch and chemical detection to navigate their subterranean habitats and locate prey. Reproduction in Blind Snakes is often parthenogenetic, meaning that females can reproduce without males, laying clutches of 1–3 eggs that hatch into miniature versions of the adults.

Fun fact: Blind Snakes are remarkable for their ability to reproduce parthenogenetically, meaning females can produce offspring without mating with a male.

41. Banded Krait

The Banded Krait (Bungarus fasciatus) is a highly venomous snake species native to the tropical and subtropical regions of Southeast Asia. Measuring typically between 93–4.5 feet (90–140 cm) in length and weighing up to Up to 3.3 lb (1.5 kg), these snakes are easily recognizable by their striking black and white banding pattern, which serves as both camouflage in their natural habitats and a warning signal to potential predators.

These snakes are adept hunters, feeding mainly on other snakes (including venomous species), small mammals, amphibians, and reptiles. Utilizing their powerful venom, Banded Kraits swiftly immobilize and subdue their prey before consumption. Reproduction occurs through oviparity, with females laying clutches of 5–15 eggs in secure, hidden locations such as burrows or beneath debris, which they do not guard.

Fun fact: Banded Kraits are known for their unique hunting strategy, which involves the use of constriction to subdue their prey before delivering a fatal bite.

42. Burmese Python

The Burmese Python (Python bivittatus) is one of the largest snake species in the world, native to Southeast Asia. These impressive constrictors can reach lengths of up to 20 feet (6 meters) and weigh over 200 lb (90 kg).

Burmese Pythons are known for their distinctive pattern of brown blotches outlined in cream or gold, providing effective camouflage in their natural habitat of forests, marshes, and grasslands. As ambush predators, they rely on their excellent sense of smell and heat-sensing pits to locate prey, which primarily consists of birds and mammals.

Fun fact: Burmese Pythons can consume prey much larger than their head by dislocating their jaws, allowing them to swallow prey whole.

Shifting from reptiles to birds, we explore animals that have mastered flight, singing, and striking displays of color—all starting with the letter ‘B.’

Birds that start with B

Birds like the bluebird, barn owl, and bald eagle stand out for their beauty and significance, whether in ecosystems or as symbols in cultures worldwide.

Barbet	Barn Owl	Blue Jay
Barred Owl	Buzzard	Barn Swallow
Bee-Eater	Bowerbird	Baya
Blue Tit	Burrowing Owl	Belted Kingfisher
Bearded Vulture

43. Barbet

Barbets are a diverse family of medium-sized birds (Megalaimidae) found in tropical and subtropical regions worldwide. Measuring 6–12 inches (15–30 cm) in length and weighing 1.8–7 oz (50–200 g), they are renowned for their vibrant plumage, stout bills, and often colorful, bristle-like feathers around their faces, which aid in species recognition and mating displays.

These omnivorous birds have a varied diet that includes fruits, insects, and small vertebrates. Highly adept climbers, barbets use their strong feet and sharp claws to grip tree branches while foraging. They typically nest in tree cavities or utilize existing holes, where females lay and incubate eggs.

Fun fact: After nesting, some barbet species will seal the entrance to their nest cavity with mud or other materials, leaving only a small opening for entering and exiting.

44. Barn Owl

The Barn Owl (Tyto alba) is a medium-sized owl species found on every continent except Antarctica. Measuring approximately 10–16 inches (25–40 cm) in length and weighing between 10–35 oz (300–1,000 g), Barn Owls are easily recognized by their distinctive heart-shaped facial disc, which funnels sound to their highly sensitive ears, enhancing their ability to locate prey in darkness.

Their predominantly pale plumage provides effective camouflage against the sky during flight. Barn Owls prey primarily on small mammals such as mice, voles, and rats, utilizing their keen vision and silent flight to hunt efficiently in low-light conditions. Barn Owls typically nest in cavities in trees, barns, or other structures, laying clutches of 4–7 eggs.

Fun fact: Barn owls have specialized adaptations for silent flight, including serrated wing feathers that help break up airflow and reduce noise.

45. Blue Jay

The Blue Jay (Cyanocitta cristata) is a strikingly colored bird native to North America,. Measuring approximately 9–12 inches (23–30 cm) in length and weighing around 2.5–3.5 oz (70–100 g), Blue Jays are renowned for their vibrant blue plumage, white underparts, and distinctive black markings on their heads and wings. Their strong, stout bills are well-adapted for cracking nuts and seeds, while their wings feature prominent black bars that add to their distinctive appearance.

They feed on a diverse diet that includes seeds, nuts, insects, fruits, and occasionally small vertebrates. Blue Jays are monogamous, forming long-term pair bonds, with females typically laying a clutch of 3–5 eggs per breeding season that are incubated for about 17–18 days.

Fun fact: Blue jays are known for their loud and distinctive calls, including their “jay” call, which they use to communicate and warn of potential threats.

46. Barred Owl

The Barred Owl (Strix varia) is a medium-sized owl native to North America. Measuring approximately 16–25 inches (40–63 cm) in length and weighing between 1.6–2.4 lb (725–1,100 g), these owls are easily identified by their distinctive barring pattern on the plumage, featuring horizontal stripes across the chest and vertical streaks on the belly.

Barred Owls have rounded heads with large, dark eyes and lack ear tufts, contributing to their unique appearance. They prey on a diverse diet that includes small mammals such as mice and voles, birds, amphibians, and insects. Nests are typically built in tree cavities, abandoned nests of other large birds, or even man-made structures, where females lay a clutch of 2–4 eggs that are incubated for about 28 days.

Fun fact: Barred owls have a broad diet and are known to occasionally hunt prey as large as rabbits or small squirrels, demonstrating their versatility as predators.

47. Buzzard

The Common Buzzard (Buteo buteo) is a medium-sized raptor native to Europe, Asia, and parts of North Africa. Measuring approximately  18–22 inches (46–58 cm) in length with a wingspan ranging from 1.3–3 lb (0.6–1.4 kg), these birds are characterized by their broad wings, short rounded tails, and robust build.

Their plumage varies from light to dark brown, featuring distinctive mottling and a prominent pale stripe running down their underside, which aids in camouflage within their diverse habitats. They prey on a variety of small mammals such as rabbits and voles, birds, reptiles, and carrion.

Fun fact: Buzzards are known for their distinctive soaring flight patterns, where they circle high in the sky on thermals, scanning the ground below for potential prey or carrion.

48. Barn Swallow

The Barn Swallow (Hirundo rustica) is a widespread and well-known bird species found on every continent except Antarctica. Measuring approximately 5.9–7.5 inches (15–19 cm) in length and weighing around 0.6–0.7 oz (17–20 g), these agile birds are easily recognized by their distinctive forked tails, long pointed wings, and striking blue-black plumage on their backs and wings, contrasted by reddish-brown underparts.

They often form large flocks during migration and are known for their impressive migration journeys between their breeding grounds in the Northern Hemisphere and wintering areas in the Southern Hemisphere. Barn Swallows construct cup-shaped nests made of mud and grass, typically located in sheltered sites such as barns, eaves of buildings. During the breeding season, females lay a clutch of 3–7 eggs, which both parents incubate for about 14–16 days.

Fun fact: Barn swallows are known for their remarkable navigational abilities, using celestial cues, landmarks, and the Earth’s magnetic field to navigate during their long migrations.

49. Bee-Eater

Bee-Eaters (Meropidae) are a diverse and vibrant family of medium-sized birds found across Europe, Africa, Asia, and Australia. Measuring approximately 6–12 inches (15–30 cm) in length and weighing between 0.6–2 oz (17–56 g), these birds are renowned for their striking plumage, which often showcases a brilliant combination of bright green, blue, yellow, and chestnut colors. Bee-Eaters possess long, slender bodies, distinctive elongated central tail feathers, and pointed wings that facilitate their agile aerial hunting skills.

Primarily feeding on flying insects like bees, wasps, and dragonflies, they expertly catch their prey mid-flight. During the breeding season, males perform elaborate aerial displays and vocalizations to attract females, showcasing their vibrant colors and agility. Females lay clutches of 2–6 eggs, which are incubated by both parents for about 17–21 days.

Fun fact: They catch flying insects on the wing and return to a perch to remove the stingers before consuming them, minimizing the risk of injury from venomous prey.

50. Bowerbird

Bowerbirds are a diverse and fascinating family of medium-sized birds found primarily in Australasia. Measuring between 8–16 inches (20–40 cm) in length and weighing 2.5–12 oz (70–340 g), they are renowned for their vibrant plumage and striking colors, which vary widely among species.

These bowers, built on the ground or in trees, are meticulously decorated with a variety of objects such as shells, feathers, berries, and even human-made items like bottle caps and pieces of plastic. In addition to building and decorating their bowers, male bowerbirds perform intricate displays and vocalizations to entice females.

Females visit these bowers to evaluate the quality and attractiveness of both the structure and the male’s performance before selecting a mate.

Fun fact: Some species of bowerbirds are known for the ability to mimic sounds, like the calls of other bird species and human-made noises such as chainsaws and camera shutters.

51. Baya

The Baya Weaver (Ploceus philippinus) is a small, vibrant bird species native to South and Southeast Asia. Measuring approximately 5.5–6.3 inches (14–16 cm) in length and weighing around 0.7–1 oz (20–30 g), these weaver birds are renowned for their striking plumage, particularly the males who display bright colors during the breeding season.

Baya Weavers are best known for their elaborate nesting colonies, where males construct intricate, flask-shaped nests using strips of leaves, grass, and other plant materials. Within their territories, males build multiple nests to increase their chances of mating, and once a female selects a nest, she may further modify it to her liking before laying a clutch of 2–4 eggs. Their diet primarily consists of seeds, grains, and insects.

Fun fact: Baya Weaver nests are constructed with such precision and durability that they can often withstand harsh weather conditions, including strong winds and heavy rainfall.

52. Blue Tit

The Blue Tit (Cyanistes caeruleus) is a small, colorful bird widely distributed throughout Europe and parts of Asia. Measuring approximately 4.7 inches (12 cm) in length and weighing around 0.4–0.6 oz (11–17 g), these birds are easily identifiable by their vibrant plumage, which features a striking combination of blue, yellow, green, and white feathers.

The bright blue cap and wings contrast beautifully with the yellow belly and greenish back, while their white cheeks add to their distinctive appearance. Blue Tits are highly active and agile foragers, feeding primarily on insects, seeds, and berries. They are cavity nesters, utilizing tree cavities, nesting boxes, or other sheltered locations to build their nests from moss, feathers, and other soft materials.

Fun fact: Blue Tits are known for their intelligence and problem-solving abilities, such as using pieces of leaf to extract insects from crevices.

53. Burrowing Owl

The Burrowing Owl (Athene cunicularia) is a small, distinctive owl species native to open habitats across North, Central, and South America. Measuring approximately 7.5–10 inches (19–25 cm) in length and weighing between 5–8.5 oz (140–240 g), these owls are easily recognizable by their long legs, sleek bodies, bright yellow eyes framed by a distinctive white “eyebrow” stripe, and short, rounded wings adapted for agile flight.

Burrowing Owls inhabit underground burrows, which they either excavate themselves or take over from other burrowing animals such as prairie dogs or ground squirrels. They feed on a diverse diet that includes insects, small mammals, reptiles and birds.

Fun fact: Burrowing owls are known for bobbing their heads up and down and standing outside their burrows during the day to survey their surroundings.

54. Belted Kingfisher

The Belted Kingfisher (Megaceryle alcyon) is a medium-sized bird of prey native to North and Central America. Measuring approximately 11–14 inches (28–35 cm) in length and weighing between 4–6 oz (113–170 g), these kingfishers are easily identifiable by their stocky bodies, large heads, prominent crests, and striking blue and white plumage accented by a bold blue band across their chest.

Their sharp, pointed beaks are perfectly adapted for catching fish, their primary diet, which they skillfully capture by diving with remarkable accuracy from perches into the water. They nest in burrows dug into sandy or gravelly banks near waterways, laying a clutch of 4–6 eggs that both parents incubate for about 25–28 days.

Fun fact: Despite their name, Belted Kingfishers are not actually closely related to kingfisher species found in other parts of the world.

55. Bearded Vulture

The Bearded Vulture (Gypaetus barbatus) is a majestic bird of prey native to the mountainous regions of Europe, Africa, and Asia. Measuring approximately 37–49 inches (94–125 cm) in body length with a wingspan reaching up to 9 feet ( 2.8 meters ), these large vultures are distinguished by their striking appearance, including a distinctive feathered “beard” on their chin that contrasts with their reddish-brown plumage.

Bearded Vultures are specialized scavengers known for their unique bone-cracking behavior—dropping bones from great heights onto rocks to access the nutritious marrow inside, a technique known as “bone tossing.” Bearded Vultures inhabit a variety of mountainous terrains, utilizing thermal currents for soaring and covering vast distances in search of food. Females typically lay a clutch of 1–3 eggs, which both parents incubate for about 45 days.

Fun fact: They rub iron rich soil into their feathers to appear fiery.

Leaving behind the skies, let’s dive underwater to discover fish beginning with ‘B.’ These aquatic animals enchant with their scales, fins, and intriguing habitats.

Fish that start with B

Fish such as the barracuda, bass, and butterflyfish showcase the diversity of aquatic life, thriving in environments ranging from coral reefs to freshwater lakes.

Bass	Barracuda	Bluegill
Bluefish	Blue Tang	Barramundi Fish
Bichir	Banjo Catfish	Blackfin Tuna
Banana Eel	Bamboo Shark	Blacktip Reef Shark
Blue Shark	Blacktip Shark	Bull Trout
Blacknose Shark	Bluefin Tuna	Basking Shark
Beluga Sturgeon

56. Bass

Bass refers to several species of freshwater and marine fish belonging to the families Percichthyidae and Moronidae. Size and weight vary among species: largemouth bass (Micropterus salmoides) typically grow up to 12–30 inches (30–76 cm) in length and weigh up to 1–20 lb (0.5–9 kg). Bass species inhabit a variety of environments, including freshwater lakes, rivers, reservoirs, and coastal marine areas, each adapted to their specific habitats.

Their diet primarily consists of smaller fish, insects, crustaceans, and other aquatic organisms. Reproduction typically involves spawning during specific seasons, with females laying thousands of eggs that are externally fertilized.

Fun fact: Bass are skilled ambush predators, relying on stealth and patience to capture their prey.

57. Barracuda

The Barracuda (Sphyraena barracuda) is a sleek and predatory fish species found in tropical and subtropical oceans worldwide, including the Caribbean Sea, the Mediterranean Sea, and the Pacific and Indian Oceans. Measuring typically between 20–79 inches (50–200 cm) in length and weighing up to 5–110 lb (2.3–50 kg), barracudas are easily recognizable by their elongated, streamlined bodies, sharp, fang-like teeth, and distinctive metallic sheen.

Their coloration ranges from silvery gray to dark blue, often featuring horizontal stripes or spots that provide effective camouflage among coral reefs and rocky substrates. Barracudas are opportunistic predators that feed on a variety of prey, including smaller fish, squid, and crustaceans. Reproduction involves pelagic eggs and larvae, with females releasing millions of eggs into the water column, where they develop independently.

Fun fact: Barracudas are capable of reaching impressive speeds of up to 35 miles per hour (56 kilometers per hour) in short bursts, making them one of the fastest fish in the ocean.

58. Bluegill

The Bluegill (Lepomis macrochirus) is a popular freshwater fish native to North America. Measuring 6–12 inches (15–30 cm) in length and weighing up to 0.5–2 lb (0.2–0.9 kg), Bluegills are easily recognizable by their deep, laterally compressed bodies with vibrant blue-green backs, fading to yellow or white on their bellies, and a distinctive black spot on their gill covers.

They consume a variety of aquatic insects, crustaceans, small fish, and zooplankton Highly sought after by anglers for their spirited fighting and abundance, Bluegills are a staple of recreational fishing. During the spawning season in late spring to early summer, males establish and defend nesting territories where females lay 50–500 eggs, with both parents guarding the nests until the fry are independent.

Fun fact: Blue tangs are capable of changing coloration, with their vibrant blue hues intensifying or fading depending on their mood, environmental conditions, and social interactions.

61. Barramundi Fish

The Barramundi (Lates calcarifer) is a prized and iconic fish species native to the Indo-Pacific region. These fish typically reach lengths of 2–6 feet (60–180 cm) and can weigh up to 50–120 lb (22–55 kg), making them one of the larger members of the drum and croaker family.

Renowned for their sleek, silver bodies and distinctive markings, barramundi are celebrated for their delicious flavor and versatility in cooking, making them highly sought after by both commercial and recreational anglers. Barramundi feed on a diverse diet that includes smaller fish, crustaceans, insects, and other aquatic organisms, utilizing their sharp teeth and agile swimming skills to capture prey effectively.

Fun fact: Barramundi are protandrous hermaphrodites, meaning they start life as males and transition to females later in life.

62. Bichir

The Bichir (Polypteridae family) is a primitive and ancient group of fish native to freshwater habitats across Africa. Often referred to as “living fossils,” bichirs exhibit unique evolutionary characteristics and resemble early ray-finned fishes from the Devonian period (419.2 to 358.9 million years ago). These elongated fish typically measure between 12–38 inches (30–96 cm) in length and weigh up to 1–8 lb (0.5–3.6 kg), depending on the species.

Bichirs possess slender bodies covered with armored scales and feature distinctive dorsal fins that resemble paddles, aiding in their slow, deliberate swimming. Equipped with primitive lungs in addition to gills, bichirs can breathe air, allowing them to survive in oxygen-deprived waters and even move short distances on land. They feed on a variety of prey including small fish, insects, and crustaceans.

Fun fact: Bichirs are capable of surviving out of water for extended periods, using their lung-like swim bladders to breathe air.

63 Banjo Catfish

The Banjo Catfish (Bunocephalus coracoideus) is a unique and unusual species of catfish native to the freshwater systems of South America. Measuring approximately 2–6 inches (5–15 cm) in length and weighing up to 0.2–0.6 oz (5–15 g), these fish are easily recognizable by their distinctive banjo-shaped bodies, featuring flattened heads and elongated, laterally compressed forms that resemble the musical instrument they are named after.

Banjo Catfish inhabit the bottom layers of rivers and streams, preferring substrates composed of sand, gravel, and mud where they can easily hide and forage. They feed on detritus, algae, and small invertebrates, utilizing their barbels and sensory organs to detect food in often murky waters. Reproduction involves the laying of adhesive eggs in secluded areas, with both parents occasionally participating in guarding the nests until the young hatch.

Fun fact: Banjo catfish are well adapted to their benthic lifestyle, with specialized barbels and sensory organs that help them locate food in the dark and murky waters.

64. Blackfin Tuna

The Blackfin Tuna (Thunnus atlanticus) is a sleek and powerful pelagic fish found in warm oceanic waters worldwide, including the Atlantic, Pacific, and Indian Oceans. Growing up to 2–3 feet (60–91 cm) in length and weighing around 20–50 lb (9–23 kg), they are characterized by their streamlined bodies, metallic blue to black backs, and prominent yellow to silver stripes on their sides.

Highly migratory and apex predators, Blackfin Tuna inhabit both offshore and nearshore environments, where they feed on small fish, squid, and crustaceans with remarkable speed and agility. Valued for their rich, flavorful flesh, they are a significant target for both commercial and recreational fisheries.

Fun fact: Blackfin tuna are known for their impressive swimming speed and endurance, capable of reaching speeds of up to 40 miles per hour (64 kilometers per hour).

65. Banana Eel

The Banana Eel (Gymnothorax miliaris) is a species of moray eel native to the tropical waters of the Indo-Pacific region, including coral reefs, rocky outcrops, and shallow coastal areas. Growing up to 2–3 feet (60–91 cm) in length, these elongated and snake-like fish are easily recognizable by their striking yellow coloration, accented with mottled patterns of black or brown along their bodies, which provide effective camouflage among the vibrant coral and rocky substrates.

As carnivorous predators, they feed on a variety of small fish, crustaceans, and cephalopods, utilizing their sharp teeth and stealthy movements to capture and subdue their targets.

Fun fact: Banana eels have a specialized pharyngeal jaw apparatus that allows them to capture and swallow prey whole, even if it is larger than their own body size.

66. Bamboo Shark

The Bamboo Shark (Chiloscyllium punctatum) is a small and docile species of shark native to the shallow coastal waters and coral reefs of the Indo-Pacific region. Growing up to 1–4 feet (30–120 cm) in length and weighing up to 2–15 lb (0.9–6.8 kg), these sharks are easily identifiable by their slender, elongated bodies and distinctive markings resembling bamboo stalks, featuring dark bands or stripes against a pale brown or grayish-brown coloration.

They possess flattened heads and small mouths equipped with sharp teeth, adapted for feeding on small fish, crustaceans, and mollusks. As oviparous species, they lay pairs of spiral-shaped eggs in secluded areas where the embryos develop externally before hatching.

Fun fact: Blue sharks have countershading with a blue top and white underside for camouflage, making them less visible from above and below.

69. Bull Shark

The Bull Shark (Carcharhinus leucas) is a formidable and highly adaptable shark species found in coastal waters and freshwater habitats worldwide. Measuring typically between 6–10 feet (1.8–3 meters) in length and weighing up to 60–450 lb (27–205 kg), bull sharks are named for their stocky build, blunt snouts, and aggressive nature. Unlike most shark species, bull sharks can tolerate low salinity environments, allowing them to venture far upstream in rivers such as the Mississippi and Amazon.

They feed on a diverse diet that includes fish, rays, turtles, seabirds, and occasionally other sharks, utilizing their powerful jaws and sharp teeth to capture and subdue prey. Reproduction is viviparous, with females giving birth to litters of 1–13 pups after a gestation period of approximately 12 months.

Fun fact: Bull sharks exhibit “uterine cannibalism,” where embryos eat their siblings in the womb, allowing only the strongest to be born.

70. Blacktip Shark

The Blacktip Shark (Carcharhinus limbatus) is a common and widely distributed shark species found in the Atlantic, Pacific, and Indian Oceans. These sharks typically reach lengths of 4–5.5 feet (1.2–1.7 meters) and weigh up to 40–55 lb (18–25 kg). They are easily identifiable by the distinctive black markings on the tips of their dorsal fins, which contrast with their gray to brownish-gray coloration.

Blacktip Sharks possess streamlined bodies and large pectoral fins, adaptations that enable efficient swimming and maneuvering in shallow coastal habitats such as estuaries, bays, and nearshore waters. They feed on a diverse diet including small fish, cephalopods, and crustaceans. Reproduction is viviparous, with females giving birth to litters of 5 to 16 pups after a gestation period of approximately 12 months.

Fun fact: Blacktip sharks often form schools of individuals of similar size and age, providing benefits such as enhanced foraging efficiency, predator protection and mating opportunities.

71. Bull Trout

The Bull Trout (Salvelinus confluentus) is a cold-water fish species native to western North America. These fish typically reach lengths of  18–32 inches (46–81 cm) and weigh between 4–20 lb (1.8–9 kg). Bull Trout are highly prized by anglers for their strong fighting abilities and striking coloration, featuring vibrant patterns of red, orange, and yellow on their flanks and belly, complemented by a silvery sheen on their sides.

As apex predators, they feed on a diverse diet that includes insects, crustaceans, and smaller fish, playing a crucial role in controlling prey populations and maintaining ecosystem balance. Reproduction occurs in late fall to early winter, with females laying thousands of eggs in gravelly riverbeds, where they develop over several months until hatching.

Fun fact: Bull trout are closely related to Dolly Varden trout and Arctic char and can hybridize with these species in areas where their ranges overlap.

72. Blacknose Shark

The Blacknose Shark (Carcharhinus acronotus) is a small and slender shark species native to the coastal waters of the western Atlantic Ocean. Typically measuring  4–5 feet (1.2–1.5 meters) in length and weighing up to 22–25 lb (10–11 kg), these sharks are easily identifiable by the distinctive black marking on the tip of their snout, which contrasts with their gray to brownish-gray coloration.

They feed on a variety of small fish, crustaceans, and mollusks, using their acute senses to locate and capture prey efficiently. Reproduction is viviparous, with females giving birth to litters of 4 to 9 pups after a gestation period of approximately 11 months.

Fun fact: They use a reproductive method called “viviparity,” meaning they birth live young rather than laying eggs, unlike many sharks.

73. Bluefin Tuna

The Bluefin Tuna (Thunnus thynnus) is a large and highly migratory fish species found in oceans worldwide, recognized as an apex predator for its impressive size, streamlined body, and remarkable swimming speed. Capable of reaching lengths over 6–10 feet (1.8–3 meters) and weighing between 300–1,500 lb (136–680 kg), Bluefin tunas are among the largest bony fish.

They feature a distinctive dark blue coloration on their back and upper sides that fades to silver on their belly, complemented by finlets along their dorsal and ventral sides that enhance their hydrodynamic efficiency.

Fun fact: Bluefin tuna are renowned for their long-distance migrations, with individuals traveling thousands of miles between their spawning grounds and feeding grounds each year.

74. Basking Shark

The Basking Shark (Cetorhinus maximus) is the second-largest living fish species, reaching lengths of up to 20–26 feet (6–8 meters) and weighing as much as 4,000–6,000 lb (1,800–2,700 kg). Found in temperate and cold waters worldwide, these gentle giants are filter feeders that primarily consume plankton and small fish by swimming with their large mouths wide open, filtering water through their specialized gill rakers.

Distinguished by their massive, elongated bodies and a prominent dorsal fin located far back on their backs, basking sharks exhibit slow, leisurely swimming behavior near the water’s surface. Often seen “basking” in the sun with their mouths open, they play a crucial role in marine ecosystems by controlling plankton populations and maintaining the balance of oceanic food webs.

Fun fact: Basking sharks jump out of the water to remove parasites.

75. Beluga Sturgeon

The Beluga Sturgeon (Huso huso) is a large and long-lived fish species native primarily to the Caspian and Black Sea basins, as well as parts of the Adriatic Sea. Renowned for their massive size, adult Beluga Sturgeons can reach lengths of up to Up to 23 feet (7 meters) and weigh over 3,500 lb (1,600 kg), making them one of the largest sturgeon species in the world.

These iconic fish possess elongated bodies with a bluish-gray coloration and distinctive rows of bony scutes along their dorsal side, which provide protection and structural support. Beluga Sturgeons are anadromous, migrating from the sea into freshwater rivers to spawn, where females lay thousands of eggs in gravelly riverbeds. They have a remarkable lifespan, often exceeding 100 years, and reach sexual maturity at around 20 years of age.

Fun fact: Beluga sturgeons are among the largest freshwater fish species in the world and can live for over 100 years.

Moving from fish to insects, we explore creatures that live both in water and on land, beginning with the letter ‘B’ and exhibiting unique life cycles.

Insects that start with B

Insects such as bed bugs, bumblebees, and bark beetles are indispensable for pollination and decomposition and serve as food for countless other species in the food chain.

Bed Bugs	Bamboo Worms	Bumblebee
Bullet Ant	Blue Morpho Butterfly	Bark Beetle

76. Bed Bugs

Bed Bugs (Cimex lectularius) are small, parasitic insects native to human dwellings worldwide, known for feeding on the blood of humans and other warm-blooded animals. Measuring approximately 0.1–0.2 inches (4–6 mm) in length and weighing less than a gram, these flat, oval-shaped bugs are reddish-brown in color and become more elongated after feeding.

Primarily nocturnal, bed bugs hide in cracks, crevices, and furniture during the day, emerging at night to feed. They are notorious for infesting bedding, mattresses, furniture, and other household items, where they can multiply rapidly through their efficient reproductive capabilities—females laying multiple eggs daily.

Fun fact: Bed bugs have developed resistance to many common insecticides, making them challenging to eradicate once they infest a living space.

77. Bamboo Worms

The Bamboo Worm (Omphisa fuscidentalis) is the larval stage of the bamboo moth, native to various parts of Asia, particularly bamboo forests. These caterpillars typically measure between 1–2 inches (2.5–5 cm) in length and weigh approximately 0.01–0.03 oz (0.3–1 g). Bamboo Worms feed on the inner layers of bamboo stems, where they grow and develop.

Once fully mature, they are harvested for consumption and are prized for their high protein content, making them a delicacy in many Asian cuisines. Despite their name, bamboo worms are not true worms but belong to the order Lepidoptera. They are usually prepared by frying or roasting and seasoned with spices to enhance their flavor, playing a significant role in traditional dishes and contributing to local economies.

Fun fact: Bamboo worms have a lifespan of up to a year and can lay up to 500 eggs in their lifetime.

78. Bumblebee

Bumblebees (Bombus spp.) are large, fuzzy bees native to temperate regions of the Northern Hemisphere. Measuring 0.4–1.6 inches (10–40 mm) in length and weighing between 0.01 – 0.07 oz (0.3 – 2 g), they are easily recognized by their distinctive black and yellow striped bodies and loud buzzing flight.

These social insects live in colonies typically consisting of a single queen, several female workers, and a few male drones. During the breeding season, queens emerge from hibernation to establish new colonies, laying eggs that develop into workers who maintain the colony’s activities.

Fun fact: Bumblebees are capable of “buzz pollination,” a technique where they vibrate their flight muscles to dislodge pollen from flowers that are otherwise difficult to access.

79. Bullet Ant

The Bullet Ant (Paraponera clavata) is a large and formidable species of ant native to the rainforests of Central and South America. Measuring approximately 1.2 inches (3 cm) in length and weighing around 0.0003–0.0005 oz (10–15 mg), these ants are easily identifiable by their distinctively large size, glossy black exoskeleton, and powerful mandibles.

The sting of a Bullet Ant is often likened to the sensation of being shot, which is the origin of their common name. These highly social insects engage in coordinated foraging and defense behaviors, effectively protecting their colonies from predators and rival ant species. Their diet primarily includes other insects, nectar, and honeydew from aphids.

Fun fact: In some indigenous cultures of South America, bullet ants are used in initiation rituals where young men undergo painful stings as a rite of passage into adulthood.

80. Blue Morpho Butterfly

The Blue Morpho Butterfly (Morpho peleides) is a stunningly beautiful species native to the rainforests of Central and South America. With a wingspan ranging from 5–6 inches (12–15 cm), these butterflies are renowned for their iridescent blue wings that shimmer and change color when viewed from different angles, a feature that helps deter predators through dazzling displays.

Blue Morpho Butterflies spend much of their day resting with their wings closed, concealing their vivid blue coloration to blend seamlessly with the lush foliage. Their lifecycle includes complete metamorphosis, beginning as eggs laid on host plants, hatching into caterpillars that feed voraciously on specific vegetation, then pupating in protective cocoons before emerging as vibrant adult butterflies.

Fun fact: The vibrant blue coloration of blue morpho butterflies is not due to pigments but rather to microscopic scales on their wings that reflect and refract light.

81. Bark Beetle

Bark Beetles (Hylurgops palliatus) are small insects belonging to the family Curculionidae within the order Coleoptera. Measuring approximately 0.08–0.3 inches (2–8 mm) in length, these beetles inhabit various forested regions, including both coniferous and deciduous forests, where they play a crucial role as decomposers by breaking down dead and decaying wood.

While essential for nutrient cycling and maintaining forest health, certain species of bark beetles become pests by tunneling into the bark of living trees. This behavior disrupts the tree’s nutrient and water transport systems, often leading to significant damage or death of the affected trees.

Fun fact: Bark beetles communicate with each other using chemical signals called pheromones, which help them coordinate their behaviors and find suitable mates and breeding sites.

Beyond the insects, there are many other animals that begin with ‘B,’ each contributing uniquely to the ecosystems they inhabit.

Other animals that start with B

Other animals, like the barnacle and box jellyfish, are intriguing members of the animal kingdom, showcasing survival in some of Earth’s most extreme environments.

Bark Scorpion	Banana Spider	Barnacle
Blanket Octopus	Blue-Ringed Octopus	Bearded Fireworm

82. Bark Scorpion

The Bark Scorpion (Centruroides exilicauda) is a venomous arachnid native to the arid regions of the southwestern United States and northern Mexico. Measuring between 2–3 inches (5–8 cm) in length, these scorpions are characterized by their pale yellow to tan coloration and slendThey hide under rocks, logs, and within crevices during the day, emerging at night to hunt insects, spiders, and other small invertebrates.

Renowned for their potent neurotoxic venom, Bark Scorpions can inflict extremely painful stings that cause severe pain, numbness, and respiratory issues in human. Females reproduce annually, giving birth to litters of 5–25 juveniles that they care for until the young are capable of independent survival.

Fun fact: Bark Scorpions possess a unique ability to fluoresce under ultraviolet light, a phenomenon that has fascinated researchers and enthusiasts alike.

83. Banana Spider

The Banana Spider (Trichonephila clavata) is a striking species of orb-weaving spider found predominantly in tropical and subtropical regions worldwide, including parts of Asia, Africa, and the Americas. Measuring approximately 1–2 inches (2.5–5 cm) in body length with legs that can extend up to 5 inches (12 cm), these spiders are easily identifiable by their vibrant yellow and black coloration, which provides effective camouflage amidst foliage and flowers.

Primarily nocturnal hunters, they patiently await prey in their expansive webs, using their keen sensory abilities to detect vibrations and swiftly subdue captured insects. During the breeding season, males engage in elaborate courtship displays to attract females, who subsequently lay clutches of 20–50 eggs within silk sacs attached to their webs.

Fun fact: The silk produced by Banana Spiders is exceptionally strong and elastic, making it highly sought after by researchers for potential applications in various industries.

84. Barnacle

Barnacles are a diverse group of crustaceans belonging to the subclass Thecostraca, predominantly found in marine environments ranging from rocky shores and coral reefs to the hulls of ships. As adults, barnacles are sessile, permanently attaching themselves to hard surfaces such as rocks, pilings, and other marine animals, often forming dense colonies that thrive in both intertidal and subtidal zones.

They possess a calcareous shell, or “capitulum,” which encloses and protects their soft bodies, enabling them to withstand the harsh forces of waves and deter predators. Barnacles vary in size, typically ranging from 0.2–2 inches (0.5–5 cm) in diameter, depending on the species, and individual weights can range from a few grams to several dozen grams in larger species.

Fun fact: Their larval stage, known as nauplii, are free-swimming and undergoes a series of molts before settling and undergoing metamorphosis into their adult form.

85. Blanket Octopus

The Blanket Octopus (Tremoctopus violaceus) is a captivating deep-sea cephalopod found in tropical and subtropical waters worldwide. These extraordinary creatures are named for the striking web-like cloak, or “blanket,” that female Blanket Octopuses possess, which stretches between their elongated dorsal arms. Females can reach lengths of up to 6.6 feet (2 meters), with their “blankets” extending over 5 feet (1.5 feet) when fully spread, potentially serving as a defense mechanism or a means of intimidating predators.

In stark contrast, males are much smaller, typically growing to only 5 centimeters (2 inches) in length and lacking the expansive “blanket” characteristic of females. Both sexes exhibit vibrant coloration, with the females displaying iridescent hues that shimmer and change under different lighting conditions.

Fun fact: Blanket Octopuses use venomous tentacles from Portuguese man o’ war jellyfish for offense and defense against threats.

86. Blue-Ringed Octopus

The Blue-Ringed Octopus (Hapalochlaena lunulata) is a small but highly venomous cephalopod native to the shallow waters of the Indo-Pacific region. Measuring typically between 4–8 inches (10–20 cm, including arms) in mantle length and weighing around 0.07–0.2 lb (15–50 g), these octopuses are easily recognizable by their vibrant blue rings that appear conspicuously when threatened, contrasting with their reddish-brown or yellowish bodies for effective camouflage among rocks and coral reefs.

Renowned as one of the most venomous marine animals, they possess a potent neurotoxin called tetrodotoxin, capable of causing paralysis and death in humans if not treated promptly. Blue-Ringed Octopuses are nocturnal and secretive, often hiding in crevices and under rocks during the day and emerging at night to hunt small crustaceans, crabs, shrimp, and fish.

Fun fact: The venom of the Blue-Ringed Octopus contains a powerful neurotoxin known as tetrodotoxin, which is also found in certain species of pufferfish and marine snails.

87. Bearded Fireworm

The Bearded Fireworm (Hermodice carunculata) is a species of marine bristle worm found in tropical and subtropical waters worldwide. These striking organisms typically reach lengths of 2–3 inches (5–8 cm) and possess slender, segmented bodies adorned with dense tufts of fine bristles, which give them their common name “fireworm” due to their vibrant red or orange coloration.

Primarily inhabiting shallow coastal waters, including coral reefs, rocky shores, and seagrass beds, they are adept at navigating complex environments to find shelter and forage. Bearded Fireworms feed on a diet of algae, detritus, and small invertebrates, utilizing their tentacle-like appendages to capture and manipulate food effectively.

Fun fact: The name “bearded” refers to the dense bristles covering the Bearded Fireworm’s body, giving it a somewhat fuzzy or “bearded” appearance.

FAQs:

What wild animals that start with B?

Here are the top 5 wild animals that start with B:

• Bongo (Tragelaphus eurycerus): Bongos are large forest antelopes found in Central Africa. They are known for their striking reddish-brown coat and long, spiral horns, which they use for defense and territorial disputes.
• Brazilian Tapir (Tapirus terrestris): Brazilian tapirs are large herbivorous mammals found in South America. They have a sleek black coat with a distinctive white “saddle” marking on their backs and long, flexible snouts.
• Black-footed Cat (Felis nigripes): Black-footed cats are small wild cats native to southern Africa. They are one of the smallest cat species in the world and are known for their excellent hunting skills and elusive nature.
• Bornean Orangutan (Pongo pygmaeus): Bornean orangutans are great apes found in the rainforests of Borneo. They are known for their reddish-brown fur and remarkable intelligence, as well as their unique way of swinging through the trees using their long arms.
• Bald Eagle (Haliaeetus leucocephalus): The bald eagle is the national bird and symbol of the United States. It is a majestic raptor with a distinctive white head and tail, brown body, and impressive wingspan, often associated with strength and freedom.

What rainforest animals that start with B?

Here are the top 5 rainforest animals that start with B:

• Bengal Tiger (Panthera tigris tigris): Bengal tigers are majestic predators found in the dense rainforests of India, Bangladesh, Nepal, and Bhutan. They are known for their striking orange coats with black stripes and are the largest members of the cat family. These solitary animals are apex predators, primarily feeding on ungulates.
• Blue Morpho Butterfly (Morpho peleides): Blue morpho butterflies are renowned for their dazzling, iridescent blue wings, which make them one of the most beautiful insects of the tropical rainforests in Central and South America. The brilliant blue coloration is a defense mechanism for camouflage against predators when their wings are closed.
• Bornean Orangutan (Pongo pygmaeus): Native to the rainforests of Borneo, Bornean orangutans are critically endangered great apes known for their distinctive red fur and intelligent, expressive faces. They are highly adaptable tree dwellers, primarily feeding on fruit, and play a crucial role in their ecosystem as seed dispersers.
• Brazilian Tapir (Tapirus terrestris): The Brazilian tapir is a large, herbivorous mammal found in the Amazon rainforest and other parts of South America. It has a distinctive prehensile snout that it uses to grab leaves and fruit. Despite its bulky body, the Brazilian tapir is an excellent swimmer and often takes to the water to escape predators.
• Black Caiman (Melanosuchus niger): The black caiman is a large crocodilian native to the Amazon basin in South America. It is the largest predator in the Amazon ecosystem, feeding on a variety of fish, reptiles, and mammals. The black caiman’s dark coloration allows it to blend into the murky waters of its rainforest habitat.

Exploring this diverse list of over 100 popular animals starting with the letter B highlights the incredible variety of life on our planet. From the powerful Bengal Tiger to the tiny but vibrant Butterfly, each animal plays a unique role in the ecosystem. Whether you’re a nature enthusiast, a student, or simply curious about the animal kingdom, we hope this guide has sparked your interest and inspired you to learn more about these fascinating creatures.

If you’re searching for animal names starting with a different letter, explore our other comprehensive articles dedicated to animal names.

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