Humans are the only animals known to blush — Darwin called it the most peculiar human expression.

A porcupine raises quills as a defense mechanism.

Fact #524 · Animals

Certain birds of prey have exceptionally sharp vision.

Fact #434 · Animals

Some butterflies migrate across continents.

Fact #424 · Animals

Dragonflies can fly in all directions, including backward.

Fact #352 · Animals

Sea otters hold hands while sleeping to avoid drifting apart.

Fact #364 · Animals

Many species of beetles have hardened wing covers called elytra.

Fact #457 · Animals

A tiger’s stripes are unique like human fingerprints.

Fact #468 · Animals

Elephants have one of the longest gestation periods of any land animal.

Fact #386 · Animals