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Science & Nature • Reptile

Caiman

A caiman is any of several Central and South American crocodilians in the family Alligatoridae, closely related to alligators.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

A caiman is any of several Central and South American crocodilians in the family Alligatoridae, closely related to alligators. They are semi-aquatic carnivores that live along rivers, swamps, lakes, and other freshwater habitats, and females lay hard-shelled eggs in nests they build and guard.

Taxonomy

Caimans are crocodilians usually classified in the family Alligatoridae. Modern sources place living caimans in three genera: Caiman, Melanosuchus, and Paleosuchus.

Habitat and distribution

Caimans are native to Central and South America and are associated with freshwater and wetland environments, including river edges, swamps, lakes, and mangrove areas.

Behaviour and diet

Caimans are amphibious carnivores. Like other crocodilians, they spend time in water and on land and feed on animal prey.

Reproduction

Female caimans lay hard-shelled eggs in nests and guard them during nesting, a pattern shared broadly with other crocodilians.

Key facts

  • Caimans are crocodilians native to Central and South America.
  • They are usually placed in the family Alligatoridae.
  • They are semi-aquatic carnivores that hunt in freshwater habitats.
  • Females build and guard nests containing hard-shelled eggs.
  • The black caiman is the largest living caiman species.
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Canadian context

Caimans are not native to Canada, but they are of interest to Canadian readers through zoo collections, wildlife education, and study of crocodilian evolution and conservation.

Frequently asked questions

What is a caiman?
A caiman is a crocodilian reptile from Central and South America, related to alligators and usually classified in the family Alligatoridae.
Where do caimans live?
Caimans live in freshwater and wetland habitats such as rivers, swamps, lakes, and mangrove margins in Central and South America.
Are caimans alligators?
No. Caimans are not alligators, but they are closely related and belong to the same family, Alligatoridae.
What do caimans eat?
Caimans are carnivores. They eat animal prey, often including fish and other aquatic or semi-aquatic animals.
How many living species of caiman are there?
There are six living species of caiman, grouped into three genera.

References

  1. Encyclopaedia Britannica — https://www.britannica.com/animal/caiman-reptile-group
    Supports: Definition, family placement, habitat, reproduction, and genera of caimans.
  2. Merriam-Webster — https://www.merriam-webster.com/dictionary/caiman
    Supports: Definition of caiman as Central and South American crocodilians similar to alligators.
  3. Wikipedia — https://en.wikipedia.org/wiki/Caiman
    Supports: Native range and general description of caimans.
  4. United Parks & Resorts — https://www.seaworld.org/animals/facts/reptiles/caimans/
    Supports: Family placement and the count of genera/species.