Cats purr not only when content but sometimes when stressed or injured.

Some spiders can glide through the air using silk.

Fact #369 · Animals

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

Fact #540 · Animals

A leopard seal is one of Antarctica’s top predators.

Fact #561 · Animals

Some fish can change color to blend with their surroundings.

Fact #392 · Animals

A parrot can mimic human speech sounds.

Fact #429 · Animals

Some birds migrate between hemispheres each year.

Fact #203 · Animals

Bats are the only mammals capable of sustained flight.

Fact #58 · Animals

Some species of penguins can swim at speeds of up to 15 miles per hour.

Fact #251 · Animals