Animals That Start With B: 180+ Species, Each With a Fact

From the blue whale to the bee hummingbird, more than 180 animals that start with B, sorted by group, each with a fact and its scientific name.

Smiling woman feeding budgerigars from her hand at an outdoor aviary
Photo: Pexels

Animals that start with B run from the blue whale, which NOAA Fisheries calls the largest animal that ever lived, to the bee hummingbird of Cuba, the smallest bird on Earth. In between sit bears, bison, bats, barracudas, black mambas, bumblebees and box jellyfish. This list covers more than 180 animals beginning with B, sorted by group: mammals, birds, reptiles and amphibians, fish, insects and other invertebrates, plus the dog, cat and farm breeds that people often look for.

Each entry gets one line of fact, and the scientific name where the species is clearly defined. Some common names, such as “baboon” or “beetle”, cover a whole genus or order rather than one species, so the Latin label points to that wider group. Facts that rest on a number or a record link to the zoo, agency or research body that published it.

Blue Whales, Bee Hummingbirds and Critically Endangered B Species

  • The blue whale is the largest animal that starts with B, and the largest that has ever lived. NOAA puts adults at 90 feet or more and over 330,000 pounds.
  • The smallest B animals include the bee hummingbird (smallest bird) and the bumblebee bat, one of the smallest mammals known.
  • Bowhead whales are estimated to live more than 200 years, the longest lifespan of any B mammal.
  • Black rhinos, Bornean orangutans and brown spider monkeys are all listed as critically endangered.
  • For young children, the easiest B animals to learn are bear, bee, bat, bird, bison, beaver, butterfly and bunny.

Quick Reference Table: 30 Well-Known Animals That Start With B

Use this table when you need a fast answer for a worksheet, a quiz or a word game. The sections that follow add many more species and a fact for each.

AnimalGroupScientific nameWhere it lives
Blue whaleMarine mammalBalaenoptera musculusAll major oceans
Bald eagleBirdHaliaeetus leucocephalusNorth America
Black bearMammalUrsus americanusNorth America
Brown bearMammalUrsus arctosNorth America, Europe, Asia
American bisonMammalBison bisonNorth America
Bengal tigerMammalPanthera tigris tigrisIndia, Bangladesh, Nepal, Bhutan
BonoboMammal (ape)Pan paniscusDemocratic Republic of the Congo
BobcatMammalLynx rufusNorth America
North American beaverMammalCastor canadensisNorth America
BaboonMammal (monkey)Papio (genus)Africa, Arabian Peninsula
Bactrian camelMammalCamelus bactrianusCentral Asia
Beluga whaleMarine mammalDelphinapterus leucasArctic and sub-Arctic seas
Bottlenose dolphinMarine mammalTursiops truncatusWarm and temperate seas
BinturongMammalArctictis binturongSouth and Southeast Asia
BilbyMammal (marsupial)Macrotis lagotisAustralia
Barn owlBirdTyto albaMost continents
Blue jayBirdCyanocitta cristataEastern and central North America
BudgerigarBirdMelopsittacus undulatusAustralia
Bee hummingbirdBirdMellisuga helenaeCuba
Black mambaReptileDendroaspis polylepisSub-Saharan Africa
Ball pythonReptilePython regiusWest and Central Africa
Bearded dragonReptilePogona vitticepsAustralia
Boa constrictorReptileBoa constrictorMexico, Central and South America
American bullfrogAmphibianLithobates catesbeianusEastern North America
Great barracudaFishSphyraena barracudaTropical and subtropical oceans
Basking sharkFishCetorhinus maximusTemperate oceans worldwide
BettaFishBetta splendensSoutheast Asia
Western honey beeInsectApis melliferaWorldwide (kept by beekeepers)
Black widow spiderArachnidLatrodectus (genus)Warm regions worldwide
Blue crabCrustaceanCallinectes sapidusWestern Atlantic coasts

Mammals That Start With B

Mammals make up the longest part of the list, partly because so many common names begin with “black”, “brown”, “blue” or “bush”. They are grouped below so you can scan by type.

Apes, Monkeys and Other Primates

  • Baboon (Papio): Large, ground-dwelling monkeys that live in troops across Africa, with the hamadryas baboon also found in Arabia.
  • Bald uakari (Cacajao calvus): An Amazon monkey with a bare, bright red face and a very short tail.
  • Bamboo lemur (Hapalemur): Madagascar lemurs that feed largely on bamboo shoots and stems.
  • Barbary macaque (Macaca sylvanus): The only wild primate living in Europe, where a population lives on the Rock of Gibraltar.
  • Black howler monkey (Alouatta caraya): Males are black and females golden, and their calls carry far across South American forest.
  • Bonobo (Pan paniscus): Along with chimpanzees, bonobos are our closest living relatives, and they live only in the Democratic Republic of the Congo.
  • Bornean orangutan (Pongo pygmaeus): The largest tree-dwelling mammal on Borneo, now listed as critically endangered.
  • Brown spider monkey (Ateles hybridus): A long-limbed monkey of Colombia and Venezuela that swings by its prehensile tail; it is critically endangered.
  • Bushbaby (galago) (Galagidae): Small nocturnal primates with huge eyes that can leap many times their body length.

Bears, Cats, Dogs and Other Carnivores

  • Badger (Meles meles): The European badger lives in family groups in underground tunnel systems called setts.
  • Banded mongoose (Mungos mungo): An African mongoose that lives in packs and raises pups communally.
  • Bat-eared fox (Otocyon megalotis): Its oversized ears help it hear termites, which make up most of its diet.
  • Bengal fox (Vulpes bengalensis): A small fox of the Indian subcontinent with a black-tipped tail.
  • Bengal tiger (Panthera tigris tigris): The national animal of India and the most numerous tiger population in the wild.
  • Binturong (Arctictis binturong): Also called the bearcat, it grips branches with its tail, and Duke University chemists found its scent marks smell like buttered popcorn.
  • Black bear (Ursus americanus): North America’s most common bear, despite the name, comes in brown, cinnamon and even near-white coats.
  • Black-footed ferret (Mustela nigripes): North America’s only native ferret, once thought extinct and now restored through captive breeding.
  • Black panther: Not a species: the name covers leopards and jaguars with a dark (melanistic) coat.
  • Bobcat (Lynx rufus): A wild cat named for its short, “bobbed” tail, found from southern Canada to Mexico.
  • Brown bear (Ursus arctos): The species includes the grizzly and the Kodiak bear, and ranges across three continents.
  • Brown hyena (Parahyaena brunnea): A shaggy hyena of southern Africa that scavenges along the desert coast of Namibia.
  • Bush dog (Speothos venaticus): A stocky South American wild dog with partly webbed feet that hunts in packs near water.

Hoofed Mammals: Bison, Buffalo and Antelopes

  • Babirusa (Babyrousa): A wild pig of Indonesia whose upper tusks grow up through the top of the snout.
  • Bactrian camel (Camelus bactrianus): The two-humped camel of Central Asia; its wild relative is a separate, rarer species.
  • Banteng (Bos javanicus): A wild cattle species of Southeast Asia, also kept as domestic Bali cattle.
  • Barasingha (Rucervus duvaucelii): The swamp deer of India, state animal of Madhya Pradesh, named for its many-tined antlers.
  • Bharal (blue sheep) (Pseudois nayaur): A Himalayan wild sheep and a main prey of the snow leopard.
  • Bighorn sheep (Ovis canadensis): Rams fight by charging and clashing their heavy curled horns.
  • Bison (Bison bison): The heaviest land animal in North America and the national mammal of the United States.
  • Black rhinoceros (Diceros bicornis): A hook-lipped browser of African bush; IFAW counts about 3,142 left.
  • Blackbuck (Antilope cervicapra): An Indian antelope whose males carry long, spiral horns.
  • Blue wildebeest (Connochaetes taurinus): The main animal in the great East African migration between Tanzania and Kenya.
  • Bongo (Tragelaphus eurycerus): A shy forest antelope of Africa with a chestnut coat and white stripes.
  • Bontebok (Damaliscus pygargus pygargus): A South African antelope pulled back from the edge of extinction by early protected areas.
  • Buffalo (African) (Syncerus caffer): One of Africa’s “Big Five”, living in herds that defend each other against lions.
  • Buffalo (water) (Bubalus bubalis): Domesticated in Asia and a major source of milk in India.
  • Burro: The common name for a small donkey, used widely in Mexico and the US Southwest.
  • Bushbuck: A solitary spotted antelope of African woodland and riverside thickets.
  • Wild boar (Sus scrofa): The wild ancestor of the domestic pig; it starts with B if you file it under “boar”.

Whales, Dolphins and Seals

  • Baikal seal (Pusa sibirica): Lives only in Lake Baikal in Siberia, one of very few seals that spend their lives in fresh water.
  • Beaked whales (Ziphiidae): Deep divers; NOAA reports a Cuvier’s beaked whale reached 2,992 meters and stayed under for more than two hours.
  • Bearded seal (Erignathus barbatus): An Arctic seal named for its thick, long whiskers, used to find clams on the seabed.
  • Beluga whale (Delphinapterus leucas): A white Arctic whale with a flexible neck, nicknamed the “canary of the sea” for its whistles.
  • Blue whale (Balaenoptera musculus): The largest animal ever, growing to 90 feet or more.
  • Boto (Amazon river dolphin) (Inia geoffrensis): A pink freshwater dolphin of the Amazon and Orinoco basins.
  • Bottlenose dolphin (Tursiops truncatus): Each dolphin develops its own signature whistle that works much like a name.
  • Bowhead whale (Balaena mysticetus): An Arctic baleen whale estimated to live more than 200 years.
  • Bryde’s whale: A tropical baleen whale that, unlike most of its relatives, does not migrate to polar waters.

Small Mammals, Rodents, Bats and Marsupials

  • Bandicoot (Peramelemorphia): Australian and New Guinean marsupials whose pouch opens toward the rear.
  • Bank vole (Myodes glareolus): A small reddish rodent of European woodland and hedgerows.
  • Bat (Chiroptera): The only mammals capable of true powered flight.
  • Beaver (Castor canadensis): North America’s largest rodent, which builds dams that create wetlands for other species.
  • Bettong (Bettongia): Small hopping marsupials, sometimes called rat-kangaroos, that dig for fungi.
  • Bilby (Macrotis lagotis): An Australian desert marsupial with rabbit-like ears, promoted as the “Easter Bilby”.
  • Black rat (Rattus rattus): Also called the roof rat, a good climber that spread worldwide on ships.
  • Brazilian free-tailed bat (Tadarida brasiliensis): Forms some of the largest bat colonies on Earth, including at Bracken Cave in Texas.
  • Brown rat (Rattus norvegicus): The common city rat, and the ancestor of the pet “fancy rat” and the lab rat.
  • Brown-throated sloth (Bradypus variegatus): A three-toed sloth of Central and South America that comes down from trees about once a week to relieve itself.
  • Brushtail possum (Trichosurus vulpecula): Common in Australian suburbs, and an invasive pest in New Zealand.
  • Bumblebee bat (Craseonycteris thonglongyai): Also called Kitti’s hog-nosed bat, it ranks among the smallest mammals in the world.

Birds That Start With B

Birds beginning with B include two record holders: the bee hummingbird for size and the bar-tailed godwit for endurance.

  • Bald eagle (Haliaeetus leucocephalus): Officially became the US national bird when a bill was signed into law in December 2024.
  • Baltimore oriole (Icterus galbula): An orange-and-black songbird and the state bird of Maryland.
  • Bar-tailed godwit (Limosa lapponica): In 2022 a tagged juvenile flew 8,435 miles nonstop from Alaska to Tasmania, a Guinness World Record for nonstop bird migration.
  • Barn owl (Tyto alba): Its heart-shaped facial disc funnels sound so well that it can catch prey in total darkness.
  • Barn swallow (Hirundo rustica): The most widespread swallow in the world, building mud nests under eaves.
  • Barred owl (Strix varia): Its call is often written as “Who cooks for you? Who cooks for you-all?”
  • Bearded vulture (Gypaetus barbatus): Lives mostly on bone, dropping large bones onto rocks to crack them.
  • Bee hummingbird (Mellisuga helenae): The world’s smallest bird, found only in Cuba.
  • Bee-eater (Merops apiaster): Catches bees in flight and rubs off the sting on a branch before swallowing.
  • Black swan (Cygnus atratus): An Australian swan with black plumage and a red bill.
  • Black-capped chickadee (Poecile atricapillus): Adds more “dee” notes to its alarm call when a predator is more dangerous.
  • Blackbird (Turdus merula): The common blackbird of Europe is a thrush, and only the male is black.
  • Blue jay (Cyanocitta cristata): A noisy, clever corvid relative that can mimic hawk calls.
  • Blue tit (Cyanistes caeruleus): A small blue-and-yellow garden bird common across Europe.
  • Blue-and-yellow macaw (Ara ararauna): A large South American parrot often kept as a pet.
  • Blue-footed booby (Sula nebouxii): Males show off their bright blue feet in a high-stepping courtship dance.
  • Bluebird (Sialia sialis): The eastern bluebird nests in tree holes and readily uses nest boxes.
  • Bobolink (Dolichonyx oryzivorus): A grassland songbird that migrates from North America to South America each year.
  • Bowerbird (Ptilonorhynchidae): Males build and decorate stick “bowers” with colored objects to attract females.
  • Brolga (Antigone rubicunda): An Australian crane famous for its leaping courtship dance.
  • Brown kiwi (Apteryx mantelli): A flightless New Zealand bird that lays an egg huge for its body size.
  • Brown pelican (Pelecanus occidentalis): Plunge-dives for fish and is the state bird of Louisiana.
  • Budgerigar (Melopsittacus undulatus): Australia’s small parakeet, which Merck says lives 5 to 10 years as a pet.
  • Bulbul (Pycnonotus cafer): The red-vented bulbul is one of the most familiar garden birds in India.
  • Bullfinch (Pyrrhula pyrrhula): The male Eurasian bullfinch has a rosy-pink breast and black cap.
  • Bunting (Passerina cyanea): Lab studies showed young indigo buntings learn to find their way by the stars.
  • Bustard (Otis tarda): The great bustard is among the heaviest birds able to fly.
  • Bittern (Botaurus stellaris): Points its bill skyward to blend into reeds, and the male’s call is a deep boom.

Reptiles and Amphibians That Start With B

Snakes, Lizards, Turtles and Crocodilians

  • Ball python (Python regius): Curls into a tight ball with its head tucked inside when frightened.
  • Banded krait (Bungarus fasciatus): A yellow-and-black banded venomous snake of South and Southeast Asia.
  • Basilisk (Basiliscus basiliscus): Sprints across the surface of water on its hind legs to escape predators.
  • Bearded dragon (Pogona vitticeps): Puffs out its spiny throat and waves one arm as social signals.
  • Black caiman (Melanosuchus niger): The largest member of the alligator family, living in the Amazon basin.
  • Black mamba (Dendroaspis polylepis): Named for the inky black inside of its mouth, not its gray-brown skin.
  • Blanding’s turtle (Emydoidea blandingii): A North American turtle with a bright yellow chin and throat.
  • Blue-tongued skink (Tiliqua): Australian lizards that flash a cobalt-blue tongue to startle predators.
  • Boa constrictor (Boa constrictor): A non-venomous snake that kills by squeezing, with a scientific name identical to its common one.
  • Bog turtle (Glyptemys muhlenbergii): One of the smallest turtles in North America, living in wet meadows.
  • Boomslang (Dispholidus typus): An African tree snake with fangs at the back of its mouth and venom that stops blood clotting.
  • Box turtle (Terrapene carolina): A hinged lower shell lets it close itself up completely.
  • Brown tree snake (Boiga irregularis): Accidentally brought to Guam, where it wiped out most of the island’s native forest birds.
  • Burmese python (Python bivittatus): An invasive predator in the Florida Everglades; state agencies had removed 5,000 of them by 2020.
  • Bushmaster (Lachesis muta): The longest venomous snake in the Americas.

Frogs, Toads and Salamanders

  • American bullfrog (Lithobates catesbeianus): The largest frog in North America, with a deep “jug-o-rum” call.
  • Barking tree frog (Hyla gratiosa): A plump tree frog of the southeastern US with a dog-like call.
  • Black rain frog (Breviceps fuscus): A round South African frog known online for its permanently grumpy face.
  • Blue poison dart frog (Dendrobates tinctorius): Its bright blue skin warns predators of the toxins it carries in the wild.
  • Boreal toad (Anaxyrus boreas): A western North American toad with a pale stripe down its back.
  • Budgett’s frog (Lepidobatrachus laevis): A wide-mouthed South American frog that screams and bites when threatened.

Fish and Sharks That Start With B

  • Banded archerfish (Toxotes jaculatrix): Spits jets of water to knock insects off leaves above the surface.
  • Barramundi (Lates calcarifer): A popular food fish of Asia and Australia that moves between salt and fresh water.
  • Barracuda (Sphyraena barracuda): A torpedo-shaped predator with fang-like teeth that hunts by sight.
  • Barreleye (Macropinna microstoma): A deep-sea fish with a transparent, fluid-filled head and upward-facing eyes.
  • Basking shark (Cetorhinus maximus): The second-largest fish alive, a harmless filter feeder that swims with its mouth open.
  • Bass (Micropterus salmoides): The largemouth bass is the most popular freshwater sport fish in the US.
  • Beluga sturgeon (Huso huso): A huge sturgeon of the Caspian and Black Sea basins, source of beluga caviar.
  • Betta (Betta splendens): The Siamese fighting fish breathes air from the surface using a labyrinth organ.
  • Bichir (Polypteridae): An ancient African fish group with lungs that lets them gulp air.
  • Blobfish (Psychrolutes marcidus): Looks like a blob only after being pulled from the deep; at depth it has a normal fish shape.
  • Blue marlin (Makaira nigricans): A fast ocean predator with a spear-like bill, prized by sport anglers.
  • Blue tang (Paracanthurus hepatus): A reef surgeonfish made famous as Dory in Finding Nemo.
  • Bluefin tuna (Thunnus thynnus): Keeps its body warmer than the surrounding water, which helps it hunt in cold seas.
  • Bluegill (Lepomis macrochirus): A sunfish that is often the first fish children catch in North American ponds.
  • Bluestreak cleaner wrasse (Labroides dimidiatus): Runs “cleaning stations” where larger fish wait to have parasites picked off.
  • Bonefish (Albula vulpes): A silvery fish of shallow tropical flats, known for fast runs when hooked.
  • Bonnethead shark (Sphyrna tiburo): A small hammerhead that eats seagrass as well as crabs and shrimp.
  • Bowfin (Amia calva): A living fossil of North American swamps that can gulp air when water is low in oxygen.
  • Boxfish (Ostraciidae): Encased in a rigid, box-shaped armor of bony plates.
  • Brook trout (Salvelinus fontinalis): A colorful North American fish that, despite its name, is actually a char.
  • Bull shark (Carcharhinus leucas): Can live in fresh water and has been found far up rivers such as the Mississippi.
  • Burbot (Lota lota): The only freshwater member of the cod order.
  • Butterflyfish (Chaetodontidae): Many have a false eyespot near the tail that confuses predators.

Insects, Spiders and Other Invertebrates Starting With B

Invertebrates are where the B list could run into the thousands, since beetles alone make up the largest order of animals described by science. These are the ones people search for most.

Insects and Arachnids

  • Bagworm moth (Psychidae): Caterpillars build portable cases from silk and bits of leaves or twigs.
  • Bark beetle (Scolytinae): Tunnels under tree bark; outbreaks have killed large areas of western North American forest.
  • Bark scorpion (Centruroides sculpturatus): The Arizona bark scorpion is the most venomous scorpion in the United States.
  • Bed bug (Cimex lectularius): A flat, wingless insect that feeds on human blood at night.
  • Bee (Apis mellifera): The western honey bee pollinates many crops and communicates through a “waggle dance”.
  • Beetle (Coleoptera): Has more described species than any other order of animals.
  • Birdwing butterfly (Ornithoptera alexandrae): Queen Alexandra’s birdwing of Papua New Guinea is the largest butterfly in the world.
  • Black soldier fly (Hermetia illucens): Its larvae are farmed to turn food waste into animal feed.
  • Black widow (Latrodectus): Females carry a red hourglass mark on the underside of the abdomen.
  • Bluebottle fly (Calliphora vomitoria): A metallic blue blowfly used by forensic scientists to estimate time of death.
  • Bombardier beetle: Mixes chemicals in its abdomen to fire a hot, irritating spray at attackers.
  • Botfly (Oestridae): Its larvae develop as parasites inside the bodies of mammals.
  • Brown marmorated stink bug (Halyomorpha halys): An Asian insect that became an invasive crop pest in the US.
  • Brown recluse (Loxosceles reclusa): A shy spider with a violin-shaped mark on its back.
  • Bullet ant (Paraponera clavata): Its sting is widely described as the most painful of any insect.
  • Bumblebee (Bombus): Can “buzz pollinate” by vibrating flowers such as tomatoes to shake out pollen.
  • Butterfly (Lepidoptera): Tastes with sensors on its feet.

Ocean and Land Invertebrates

  • Banana slug (Ariolimax): A big yellow slug of Pacific coast forests and the mascot of UC Santa Cruz.
  • Barnacle (Cirripedia): A crustacean that glues its head to a rock and kicks food into its mouth with its legs.
  • Blue crab (Callinectes sapidus): The Chesapeake Bay’s signature crab; its scientific name means “savory beautiful swimmer”.
  • Blue-ringed octopus (Hapalochlaena): A small octopus whose glowing blue rings warn of a potent nerve toxin.
  • Bluebottle (Portuguese man o’ war) (Physalia): Not a jellyfish but a colony of organisms, with long stinging tentacles.
  • Bobtail squid (Euprymna scolopes): Hosts glowing bacteria that hide its silhouette from predators below.
  • Box jellyfish (Cubozoa): Cube-shaped jellyfish whose stings can be deadly to humans.
  • Brine shrimp (Artemia): Tiny crustaceans sold as “Sea-Monkeys” whose eggs can survive dry for years.
  • Bristle worm (Polychaeta): Segmented marine worms covered in bristles, common in reef aquariums.
  • Brittle star (Ophiuroidea): Relatives of starfish with thin, snaking arms that break off and regrow.

Dog, Cat and Farm Breeds That Start With B

Many searches for “B animals” are really looking for domestic breeds. These are breeds rather than species, so they share the scientific name of their species. If you are choosing a pet rather than filling a worksheet, our guide to pets that start with A uses the same approach with care levels and sizes.

Dog Breeds

  • Basenji: An African hound that does not bark in the usual way but makes a yodel-like sound.
  • Basset Hound: Short legs and long ears that help sweep scent toward its nose.
  • Beagle: A scent hound used at US airports to sniff out banned food in luggage.
  • Belgian Malinois: A herding breed now widely used by police and military units.
  • Bernese Mountain Dog: A tricolor Swiss farm dog once used to pull carts.
  • Bichon Frise: A small white dog with a curly coat that needs regular professional grooming.
  • Bloodhound: Built for following a scent trail over long distances, with loose skin and long ears.
  • Border Collie: Bred on the border of England and Scotland to herd sheep.
  • Borzoi: A tall, silky Russian sighthound once used to hunt wolves.
  • Boston Terrier: A compact American breed nicknamed the “American Gentleman” for its tuxedo markings.
  • Boxer: A muscular German breed known for playful energy well into adulthood.
  • Bull Terrier: Recognizable by its long, egg-shaped head.
  • Bulldog: A flat-faced breed prone to breathing problems in heat.
  • Bullmastiff: Bred in England to help gamekeepers stop poachers.

Cat Breeds

  • Balinese: Essentially a longhaired Siamese, with the same pointed coloring.
  • Bengal: Developed by crossing domestic cats with the wild Asian leopard cat.
  • Birman: A colorpoint cat with pure white “gloves” on all four paws.
  • Bombay: Bred to look like a miniature black panther, with a glossy black coat.
  • British Shorthair: A stocky cat with a dense, plush coat, best known in blue-gray.
  • Burmese: A compact, heavy-for-its-size cat with a short satin coat.

Farm Animals and Horses

  • Belgian draft horse: A heavy draft breed from Belgium, built for pulling.
  • Berkshire pig: An English pig breed prized for marbled pork.
  • Boer goat: A meat goat developed in South Africa.
  • Brahma chicken: A large chicken breed with feathered feet.
  • Brahman cattle: Heat-tolerant humped cattle developed in the US from Indian zebu stock.
  • Brown Swiss: A Swiss dairy breed whose milk is favored for cheesemaking.

Endangered Animals That Start With B

Several animals on this list are in real trouble. IFAW’s 2024 roundup of the world’s most endangered animals includes four B species, all rated critically endangered on the IUCN Red List.

AnimalStatusWhat IFAW reports
Black rhinoCritically endangeredAbout 3,142 remain
Bornean orangutanCritically endangeredPopulation decreasing
Brown spider monkeyCritically endangeredPopulation decreasing
Scalloped bonnethead sharkCritically endangeredPopulation decreasing

The black-footed ferret is the comeback story of the list. It was presumed extinct before a small population turned up in Wyoming, and every black-footed ferret alive today descends from a handful of animals captured there for a breeding program.

Fun Facts About Animals Beginning With B

  • Biggest: A blue whale can weigh over 330,000 pounds, roughly as much as 24 elephants, according to NOAA.
  • Oldest: Bowhead whales are estimated to live more than 200 years, which means some alive today were born in the 1800s.
  • Farthest flier: The bar-tailed godwit’s 8,435-mile nonstop trip from Alaska to Tasmania beat every recorded bird migration.
  • Strangest smell: Binturong scent marks contain 2-AP, the same compound that gives cooked popcorn its aroma.
  • Smallest: The bee hummingbird and the bumblebee bat compete for the “tiniest” title among birds and mammals.
  • Walks on water: The basilisk lizard can run across a pond on its hind legs.
  • Redundant name: Boa constrictor is both the common and the scientific name of the snake.
  • Late recognition: The bald eagle appeared on the Great Seal of the United States in 1782 but only became the official national bird in 2024.
  • Deepest diver: A Cuvier’s beaked whale holds the cetacean record at 1.9 miles deep.

Easy B Animals for Kids, Classrooms and Word Games

For preschool letter practice, stick to animals children can picture: bear, bee, bat, bird, bison, beaver, butterfly, bunny, bull and bug. For older students, a worksheet that mixes groups (one mammal, one bird, one fish, one insect) teaches classification at the same time as the letter.

NeedGood B animals
Three or four lettersBat, bee, boa, bear, boar, bull, buck, bass
Colors in the nameBlue whale, black bear, brown bear, blue jay, black swan, blue tang
Sea animalsBlue whale, beluga, barracuda, basking shark, blue crab, box jellyfish
Cute or cuddlyBunny, bushbaby, bilby, binturong, baby beaver, budgie
Scary or dangerousBlack mamba, bull shark, box jellyfish, black widow, brown bear
PetsBeagle, Bengal cat, budgie, betta, bearded dragon, ball python

Teachers building an A-to-Z animal unit can pair this list with our letter-based name guides, such as boys names starting with A, for alphabet games that cross over into spelling. More reference lists like this one live in our Lifestyle section.

Sea Creatures, Cute Picks and Endangered B Animals

What Is the Biggest Animal That Starts With B?

The blue whale. NOAA Fisheries calls it the largest animal that ever lived, at 90 feet or more in length. On land, the bison is the heaviest B animal in North America.

What Is the Smallest Animal That Starts With B?

Among birds it is the bee hummingbird of Cuba, and among mammals the bumblebee bat of Thailand and Myanmar. Invertebrates such as brine shrimp are smaller still.

What Sea Animals Start With B?

Blue whale, bowhead whale, beluga, bottlenose dolphin, beaked whales, bearded seal, barracuda, basking shark, blue tang, bonnethead shark, blue crab, barnacle, box jellyfish, blue-ringed octopus and brittle star all live in the ocean.

What Are Some Cute Animals That Start With B?

Bunnies, bushbabies, bilbies, binturongs, baby beavers, budgies, black-footed ferrets and bat-eared foxes regularly top “cute animal” lists for the letter B.

Which Animals Starting With B Are Endangered?

The black rhino, Bornean orangutan, brown spider monkey and scalloped bonnethead shark are all critically endangered. The black-footed ferret and bog turtle are also protected in the United States.

NOAA Whale Facts, Duke Research and IFAW’s Endangered List

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Founder, Editor and Business Reporter, Bizolaunch

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