- Alligators and crocodiles: Some species of alligators and crocodiles are known to engage in cannibalism, particularly when food is scarce.
- Ants: Some ant species, such as army ants and certain species of fire ants, exhibit cannibalistic behavior as part of their social hierarchy and resource management.
- Chimpanzees: Chimpanzees have been observed engaging in cannibalism, primarily during territorial conflicts or when food resources are limited.
- Earwigs: Female earwigs have been known to eat their own young or unhatched eggs under certain circumstances, such as extreme food scarcity.
- Fishes: Cannibalism is observed in various fish species, including piranhas, some species of catfish, and certain cichlids.
- Insects: Cannibalism is prevalent in many insect species, such as praying mantises, spiders, and certain beetles.
- Lions: While not as common as in other species, cannibalism has been observed among lions, especially during periods of food shortages or when competing for territory.
- Spiders: Some species of spiders, such as the black widow, exhibit cannibalistic behavior, where the female spider may consume the male after mating.