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Animals That Start With “B”

Browse 29 verified species whose common names begin with the letter B.

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MammaliaAnimal group

Baboon

Papio

Diet: Omnivore with plant foods forming most of the diet
Wild lifespan: Species-specific; adults may live 20–30 years

MammaliaNE

Bactrian Camel

Camelus bactrianus

Diet: Herbivore
Wild lifespan: Commonly 30–40 years with good care

ReptiliaLC

Baird's Rat Snake

Pantherophis bairdi

Diet: Constricting predator of small vertebrates
Wild lifespan: Wild lifespan is uncertain; managed rat snakes may live 15–20 years or more

AvesLC

Bald Eagle

Haliaeetus leucocephalus

Diet: Carnivore and opportunistic scavenger
Wild lifespan: Often 20–30 years in the wild

AvesLC

Barn Owl

Tyto alba

Diet: Carnivore
Wild lifespan: Often 4–8 years in the wild, with some much older

ReptiliaLC

Bearded Dragon

Pogona vitticeps

Diet: Omnivore
Wild lifespan: Often 5–8 years in the wild and 10–15 years with excellent captive care

ReptiliaNE

Beauty Rat Snake

Elaphe taeniura

Diet: Active nonvenomous predator of small vertebrates
Wild lifespan: Often 12–18 years in managed care; wild lifespan is poorly documented

MammaliaEN

Bengal Tiger

Panthera tigris tigris

Diet: Carnivore
Wild lifespan: Often 10–15 years; survival varies

MammaliaLC

Bighorn Sheep

Ovis canadensis

Diet: Herbivore
Wild lifespan: Often 10–15 years for females; males commonly live fewer years

ReptiliaLC

Bismarck Ringed Python

Bothrochilus boa

Diet: Ground-level ambush predator of small vertebrates
Wild lifespan: Managed individuals may live 15–20 years; wild longevity is uncertain

ReptiliaLC

Black Caiman

Melanosuchus niger

Diet: Carnivore
Wild lifespan: Several decades; precise maximum in the wild is uncertain

ReptiliaLC

Black Mamba

Dendroaspis polylepis

Diet: Carnivore
Wild lifespan: Possibly 10–15 years in the wild

ReptiliaLC

Black Rat Snake

Pantherophis obsoletus

Diet: Carnivorous constrictor of small vertebrates
Wild lifespan: Often 10–15 years in the wild; managed individuals may exceed 20 years

ArachnidaAnimal group

Black Widow Spider

Latrodectus

Diet: Carnivore; mostly insects and other arthropods
Wild lifespan: No single genus-wide lifespan; females outlive males in studied species

ReptiliaLC

Black-Headed Python

Aspidites melanocephalus

Diet: Reptile-specialist constrictor
Wild lifespan: Often 20 years or more; managed animals may reach 20–30 years

ReptiliaNE

Black-Throated Monitor

Varanus albigularis microstictus

Diet: Opportunistic predator and scavenger
Wild lifespan: Often 15–20 years in managed care; wild longevity is uncertain

ReptiliaLC

Blood Python

Python brongersmai

Diet: Ambush predator of warm-blooded vertebrates
Wild lifespan: Often 15–20 years in managed care; wild longevity is less certain

ReptiliaLC

Blue Belly Lizard

Sceloporus occidentalis

Diet: Active hunter of terrestrial invertebrates
Wild lifespan: Often about 4–7 years in the wild, with many young lost earlier

AvesLC

Blue Jay

Cyanocitta cristata

Diet: Omnivore
Wild lifespan: Many live several years; the oldest known banded wild bird exceeded 26 years

ActinopterygiiVU

Blue Marlin

Makaira nigricans

Diet: Carnivore
Wild lifespan: Females may live about 20 years and males around 10 years; estimates vary by ocean and method

MammaliaEN

Blue Whale

Balaenoptera musculus

Diet: Baleen-filtering carnivore
Wild lifespan: Often estimated at 70–90 years; some live longer

MammaliaLC

Blue Wildebeest

Connochaetes taurinus

Diet: Herbivore
Wild lifespan: About 20 years in the wild, with substantial mortality earlier in life

InsectaNE

Boxelder Bug

Boisea trivittata

Diet: Seed-feeding herbivore
Wild lifespan: About one year, with adults surviving winter

ReptiliaLC

Bredl’s Python

Morelia bredli

Diet: Ambush constrictor of birds and mammals
Wild lifespan: Often 15–25 years in managed care; wild longevity is poorly quantified

ReptiliaLC

Brown Tree Snake

Boiga irregularis

Diet: Opportunistic predator of vertebrates
Wild lifespan: Likely 10–15 years; precise wild longevity is uncertain

ReptiliaLC

Bullsnake

Pituophis catenifer sayi

Diet: Carnivorous constrictor specializing in small vertebrates
Wild lifespan: Often 12–15 years; individuals in managed care may live longer

MammaliaNT

Bush Dog

Speothos venaticus

Diet: Carnivore specializing in medium-sized vertebrate prey
Wild lifespan: Wild lifespan is poorly known; captive animals can live more than 10 years

MammaliaLC

Common Bottlenose Dolphin

Tursiops truncatus

Diet: Carnivore
Wild lifespan: Commonly 40–60 years; females often outlive males

CephalopodaNE

Greater Blue-ringed Octopus

Hapalochlaena lunulata

Diet: Carnivore
Wild lifespan: Approximately 1.5–2 years