This list includes 31 Reptiles that start with B, from “Ball python” to “Bushmaster”. They include snakes, lizards and turtles used in study, conservation and as pets.
Reptiles that start with B are species whose common names begin with the letter B. The Ball python is a notable example, prized in herpetology and the pet trade for its calm, coiling defense behavior.
Below you’ll find the table with Common name, Scientific name, Habitat and Average size.
Common name: The widely used English name that helps you recognize species in field guides, pet listings, and casual conversation.
Scientific name: The Latin binomial (genus and species) that lets you find precise, globally accepted identification and literature.
Habitat: Short description of typical environments where the species lives, helping you understand its ecology and distribution.
Average size: The average adult length or carapace/SVL noted in centimetres, so you can compare typical adult sizes quickly.
Sources: The Reptile Database; IUCN Red List. Last updated: 2025-12-01.
Reptiles that start with B
| Common name | Scientific name | Habitat | Average adult size (cm) |
|---|---|---|---|
| Black mamba | Dendroaspis polylepis | savanna/woodland | 270 cm (total length) |
| Boa constrictor | Boa constrictor | tropical forest | 300 cm (total length) |
| Ball python | Python regius | grassland/savanna | 120 cm (total length) |
| Banded krait | Bungarus fasciatus | wetlands/farms | 180 cm (total length) |
| Banded sea krait | Laticauda colubrina | coastal reef | 110 cm (total length) |
| Brown tree snake | Boiga irregularis | forest/urban | 200 cm (total length) |
| Blanding’s turtle | Emydoidea blandingii | freshwater wetlands | 20 cm (carapace length) |
| Bog turtle | Glyptemys muhlenbergii | freshwater bogs | 11 cm (carapace length) |
| Blue iguana | Cyclura lewisi | rocky coastal scrub | 100 cm (total length) |
| Black caiman | Melanosuchus niger | freshwater rivers | 400 cm (total length) |
| Brazilian rainbow boa | Epicrates cenchria | tropical forest | 150 cm (total length) |
| Bearded dragon | Pogona vitticeps | arid woodlands | 40 cm (total length) |
| Black-headed python | Aspidites melanocephalus | arid/semi-arid | 250 cm (total length) |
| Black rat snake | Pantherophis obsoletus | forests/farmland | 180 cm (total length) |
| Black-necked spitting cobra | Naja nigricollis | savanna/forest | 160 cm (total length) |
| Black kingsnake | Lampropeltis getula | woodlands/grasslands | 120 cm (total length) |
| Brown anole | Anolis sagrei | urban/forest edge | 12 cm (SVL) |
| Broad-headed skink | Plestiodon laticeps | deciduous forests | 35 cm (total length) |
| Blue-tongued skink | Tiliqua scincoides | grassland/woodland | 40 cm (total length) |
| Bengal monitor | Varanus bengalensis | dry forests/agriculture | 150 cm (total length) |
| Banded water snake | Nerodia fasciata | freshwater rivers | 120 cm (total length) |
| Banded rock rattlesnake | Crotalus lepidus | rocky mountains | 60 cm (total length) |
| Black racer | Coluber constrictor | open woodlands | 140 cm (total length) |
| Brown basilisk | Basiliscus vittatus | riparian forest | 60 cm (total length) |
| Black-breasted leaf turtle | Geoemyda spengleri | subtropical forest | 18 cm (carapace length) |
| Bell’s hingeback tortoise | Kinixys belliana | savanna/woodland | 30 cm (carapace length) |
| Burmese python | Python bivittatus | grassland/forest | 360 cm (total length) |
| Blue-spotted monitor | Varanus macraei | tropical forest | 60 cm (total length) |
| Borneo short-tailed python | Python breitensteini | tropical forest | 150 cm (total length) |
| Bushmaster | Lachesis muta | tropical forest | 250 cm (total length) |
| Black tree monitor | Varanus beccarii | mangrove/tropical forest | 120 cm (total length) |
Descriptions
Black mamba
Widespread in sub-Saharan Africa; extremely fast, highly venomous; feared but ecologically important and subject to antivenom programs.
Boa constrictor
Neotropical constrictor from Mexico to Argentina; ambush predator with heat-sensing pits; popular pet though wild collection has impacted some populations.
Ball python
West African night-active constrictor favored as a calm pet; numerous captive morphs have reduced wild-collection pressure.
Banded krait
Striped Asian elapid with powerful neurotoxic venom; nocturnal and often found near human habitations.
Banded sea krait
Indo-Pacific sea snake that forages at reefs and returns to land to lay eggs; distinctive bands and semi-aquatic behavior.
Brown tree snake
Native to Australia/PNG but invasive on Guam, where it devastated bird populations; rear-fanged and mildly venomous to prey.
Blanding’s turtle
North American marsh turtle with bright yellow throat; long-lived and declining due to wetland loss and road mortality.
Bog turtle
Tiny, secretive North American turtle that is endangered from habitat destruction and illegal collection.
Blue iguana
Endemic to Grand Cayman; large, blue male coloration and subject of successful captive-breeding recovery programs.
Black caiman
Amazonian apex predator; historically overhunted but recovering in parts of its range.
Brazilian rainbow boa
Central/South American boa prized for iridescent sheen; habitat loss and collection are conservation concerns.
Bearded dragon
Australian agamid popular as a friendly, easy-to-care-for pet; known for throat “beard” display when stressed or courting.
Black-headed python
Australian constrictor with a striking black head; feeds on reptiles and small mammals; not dangerously venomous.
Black rat snake
Climbing North American snake that controls rodents; common but often killed due to mistaken identity.
Black-necked spitting cobra
African spitting cobra known to aim venom at eyes; medically significant and involved in human-wildlife conflict.
Black kingsnake
North American snake known for eating other snakes, including venomous species; beneficial in keeping pests down.
Brown anole
Originally Caribbean; now invasive in parts of the US; small, territorial lizard with colorful dewlap displays.
Broad-headed skink
Southeastern US lizard; dominant males develop wide orange heads during breeding season; often found in trees.
Blue-tongued skink
Australian skink with a bright blue tongue used to deter predators; hardy pet, ground-dwelling and omnivorous.
Bengal monitor
Widespread South Asian monitor, adaptable and omnivorous; often hunted or captured for local use and the pet trade.
Banded water snake
Common aquatic snake of the southeastern US that eats fish and amphibians; nonvenomous but frequently misidentified.
Banded rock rattlesnake
Small, banded rattlesnake inhabiting rocky outcrops in the southwestern US/Mexico; venomous but secretive.
Black racer
Fast-moving nonvenomous North American snake; often seen during the day hunting small animals.
Brown basilisk
Central American “Jesus lizard” that can sprint across water; males have head crests and are territorial.
Black-breasted leaf turtle
Southeast Asian forest turtle with dark breastplate; threatened by habitat loss and collection for food/trade.
Bell’s hingeback tortoise
African tortoise with a hinged shell rear allowing defense; hunted locally but persists in parts of its range.
Burmese python
Large Southeast Asian python; invasive in Florida where it harms native wildlife; heavily traded in past decades.
Blue-spotted monitor
Island endemic from Indonesia with vivid blue spots; sought after in pet trade and vulnerable due to limited range.
Borneo short-tailed python
Bornean burrowing python with robust body and short tail; secretive species sometimes kept by specialist keepers.
Bushmaster
Largest venomous pitviper of the Americas; secretive nocturnal hunter in Neotropical forests; dangerous to humans and important predator.
Black tree monitor
Large arboreal monitor from New Guinea and nearby islands; glossy black coloration; challenging in captivity and vulnerable to collection.