This list includes 14 Big animals that start with J, from “Jabiru” to “Jentink’s Duiker”. They are large mammals, birds, reptiles, and fish, useful for classrooms, field guides, and online lists.
Big animals that start with J are large species whose adult size makes them notable and ecologically important. For example, the Jabiru towers over wetlands and symbolizes river ecosystems in parts of the Americas.
Below you’ll find the table with Common name, Scientific name, Primary habitat (biome + region), and Typical wild lifespan (years).
Common name: The everyday name of the animal helps you quickly identify species in field notes and general research.
Scientific name: The Latin binomial lets you match species across sources and find precise scientific information.
Primary habitat (biome + region): Shows where the species usually lives, helping you focus searches and plan field observations.
Typical wild lifespan (years): Gives the expected adult lifespan in the wild to help with life history and conservation context.
Big animals that start with J
| Common name | Scientific name | Typical adult size | Primary habitat (biome + region) |
|---|---|---|---|
| Jabiru | Jabiru mycteria | 6-8 kg (13-18 lb); 1.5 m (5 ft) tall | Wetlands and savannas — Central and South America |
| Jack Crevalle | Caranx hippos | 10-25 kg (22-55 lb); 1.2 m (4 ft) | Coastal marine waters — Atlantic Ocean |
| Jaguar | Panthera onca | 56-96 kg (124-212 lb); 1.85 m (6 ft) long | Tropical rainforests and wetlands — The Americas |
| Japanese Angelshark | Squatina japonica | Length up to 2 m (6.5 ft) | Sandy seabeds — Northwest Pacific Ocean |
| Japanese Giant Salamander | Andrias japonicus | 25 kg (55 lb); 1.5 m (5 ft) long | Cold mountain streams — Japan |
| Japanese Macaque | Macaca fuscata | 11-13 kg (24-29 lb) for males | Temperate forests — Japan |
| Japanese Serow | Capricornis crispus | 25-45 kg (55-99 lb) | Dense mountain woodlands — Japan |
| Japanese Spider Crab | Macrocheira kaempferi | Up to 19 kg (42 lb); leg span up to 3.7 m (12 ft) | Deep ocean floor — Off the coast of Japan |
| Japanese Sturgeon | Acipenser multiscutatus | Length up to 1.5 m (5 ft) | Coastal marine and river systems — Northwest Pacific |
| Jau Catfish | Zungaro zungaro | Up to 50 kg (110 lb); 1.7 m (5.6 ft) long | Large river basins — Amazon and Orinoco rivers |
| Javan Rhinoceros | Rhinoceros sondaicus | 900-2,300 kg (1,984-5,070 lb) | Tropical rainforest — Java, Indonesia |
| Javan Warty Pig | Sus verrucosus | 44-100 kg (97-220 lb) | Grasslands and secondary forests — Java, Indonesia |
| Javelina | Pecari tajacu | 16-27 kg (35-60 lb) | Arid scrubland and deserts — The Americas |
| Jentink’s Duiker | Cephalophus jentinki | Around 70 kg (154 lb) | Dense rainforests — West Africa |