Here you’ll find 31 Big animals that start with B, organized from “Bactrian camel” to “Burmese python”. They include large mammals, birds, reptiles, and fish defined by typical adult mass or length. You can use this list for learning, teaching, quick reference, or creating wildlife content.
Big animals that start with B are large-bodied species whose common names begin with the letter B. Many played notable roles in culture and trade, such as the Bactrian camel on Silk Road caravans.
Below you’ll find the table with Common name, Scientific name, Primary habitat, and Typical wild lifespan (years).
Common name: The everyday species name; you use it to quickly recognize and search for animals.
Scientific name: The Latin name gives precise species identification and helps you find reliable scientific information.
Primary habitat: Lists biome and region so you know where each animal lives in the wild.
Typical wild lifespan (years): Shows average adult lifespan in the wild to guide comparisons and planning.
Big animals that start with B
| Common name | Scientific name | Primary habitat (biome + region) | Typical adult size & typical wild lifespan |
|---|---|---|---|
| Blue whale | Balaenoptera musculus | Oceanic — Worldwide | Weight: 120,000 kg; Length: 24.0 m; Lifespan: 80 yrs |
| Bowhead whale | Balaena mysticetus | Arctic sea ice — Arctic | Weight: 75,000 kg; Length: 15.0 m; Lifespan: 100 yrs |
| Bryde’s whale | Balaenoptera brydei | Coastal tropical seas — Indo-Pacific | Weight: 20,000 kg; Length: 13.0 m; Lifespan: 50 yrs |
| Beluga whale | Delphinapterus leucas | Coastal Arctic/subarctic seas — Arctic regions | Weight: 1,000 kg; Length: 4.0 m; Lifespan: 35 yrs |
| Bluefin tuna | Thunnus thynnus | Pelagic — North Atlantic | Weight: 450 kg; Length: 3.0 m; Lifespan: 15 yrs |
| Blue shark | Prionace glauca | Pelagic ocean — Worldwide | Weight: 200 kg; Length: 3.5 m; Lifespan: 20 yrs |
| Basking shark | Cetorhinus maximus | Temperate coastal seas — Worldwide | Weight: 5,000 kg; Length: 8.0 m; Lifespan: 50 yrs |
| Bull shark | Carcharhinus leucas | Coastal rivers & estuaries — Tropics worldwide | Weight: 230 kg; Length: 3.5 m; Lifespan: 16 yrs |
| Black marlin | Istiompax indica | Tropical open seas — Indo-Pacific | Weight: 700 kg; Length: 4.6 m; Lifespan: 20 yrs |
| Beluga sturgeon | Huso huso | Large rivers & adjacent seas — Caspian/Black Sea basins | Weight: 1,200 kg; Length: 6.0 m; Lifespan: 60 yrs |
| Black caiman | Melanosuchus niger | Tropical freshwater — Amazon Basin | Weight: 300 kg; Length: 4.0 m; Lifespan: 50 yrs |
| Boa constrictor | Boa constrictor | Tropical forest & savanna — Central/South America | Weight: 30 kg; Length: 3.0 m; Lifespan: 20 yrs |
| Burmese python | Python bivittatus | Tropical forest & grassland — Southeast Asia | Weight: 150 kg; Length: 5.5 m; Lifespan: 25 yrs |
| Black mamba | Dendroaspis polylepis | Savanna/woodland — Sub-Saharan Africa | Weight: 2.0 kg; Length: 2.8 m; Lifespan: 11 yrs |
| Bison | Bison bison | Grassland/steppe — North America | Weight: 700 kg; Height: 1.8 m; Lifespan: 20 yrs |
| Bactrian camel | Camelus ferus | Desert/steppe — Central Asia | Weight: 600 kg; Height: 2.3 m; Lifespan: 40 yrs |
| Buffalo | Syncerus caffer | Savanna/woodland — Sub-Saharan Africa | Weight: 700 kg; Height: 1.7 m; Lifespan: 20 yrs |
| Bonobo | Pan paniscus | Tropical rainforest — Congo Basin | Weight: 45 kg; Height: 1.5 m; Lifespan: 40 yrs |
| Bongo | Tragelaphus eurycerus | Montane & lowland forest — Central/West Africa | Weight: 250 kg; Height: 1.2 m; Lifespan: 20 yrs |
| Blue wildebeest | Connochaetes taurinus | Savanna — East & Southern Africa | Weight: 170 kg; Height: 1.4 m; Lifespan: 20 yrs |
| Brown bear | Ursus arctos | Forest/mountain — Northern Hemisphere | Weight: 300 kg; Height: 2.5 m; Lifespan: 25 yrs |
| Black bear | Ursus americanus | Forest/woodland — North America | Weight: 90 kg; Length: 1.5 m; Lifespan: 20 yrs |
| Brown hyena | Parahyaena brunnea | Arid scrub & coastal plains — Southern Africa | Weight: 40 kg; Height: 0.8 m; Lifespan: 12 yrs |
| Black rhinoceros | Diceros bicornis | Savanna & scrub — Sub-Saharan Africa | Weight: 1,000 kg; Height: 1.5 m; Lifespan: 35 yrs |
| Blue sheep | Pseudois nayaur | Alpine grassland — Himalaya/Tibetan Plateau | Weight: 50 kg; Height: 0.8 m; Lifespan: 15 yrs |
| Broadnose sevengill shark | Notorynchus cepedianus | Coastal temperate seas — Southern Hemisphere & Pacific | Weight: 150 kg; Length: 3.0 m; Lifespan: 25 yrs |
| Bronze whaler | Carcharhinus brachyurus | Coastal warm seas — Southern Hemisphere | Weight: 120 kg; Length: 3.5 m; Lifespan: 20 yrs |
| Brazilian tapir | Tapirus terrestris | Tropical forest & wetlands — Amazon Basin & South America | Weight: 250 kg; Length: 2.0 m; Lifespan: 25 yrs |
| Baird’s tapir | Tapirus bairdii | Tropical forest & mountains — Central America | Weight: 250 kg; Length: 2.0 m; Lifespan: 30 yrs |
| Barasingha | Rucervus duvaucelii | Floodplain grassland & swamp — South Asia | Weight: 150 kg; Height: 1.2 m; Lifespan: 20 yrs |
| Blackbuck | Antilope cervicapra | Grassland & scrub — Indian subcontinent | Weight: 35 kg; Height: 0.8 m; Lifespan: 15 yrs |