Some ants have 'soldier' castes with enormous heads whose only job is to block nest entrances with their faces.

Sea otters hold hands while sleeping to avoid drifting apart.

Fact #364 · Animals

Some sharks detect electrical signals from other animals.

Fact #128 · Animals

Butterflies can see ultraviolet patterns on flowers.

Fact #368 · Animals

Certain frogs can inflate themselves to appear larger to predators.

Fact #377 · Animals

Some birds can mimic human speech.

Fact #268 · Animals

Some reptiles can survive long periods without food.

Fact #501 · Animals

Some butterflies migrate seasonally.

Fact #505 · Animals

A grizzly bear can run surprisingly fast over short distances.

Fact #492 · Animals