Chimpanzees cooperate.

Some birds can see ultraviolet light.

Fact #120 · Animals

Crows can recognize individual human faces.

Fact #15 · Animals

Sea otters hold hands while sleeping to avoid drifting apart.

Fact #364 · Animals

Certain birds can recognize themselves in mirrors.

Fact #404 · Animals

Certain frogs can inflate themselves to appear larger to predators.

Fact #377 · Animals

Some species of snakes give live birth instead of laying eggs.

Fact #540 · Animals

Certain octopus species are known for their intelligence.

Fact #495 · Animals

Some mammals hibernate during winter.

Fact #303 · Animals