Crows can recognize and remember human faces, and will hold grudges against people who have wronged them.

A rhinoceros has thick skin for protection.

Fact #504 · Animals

A sloth can take up to a month to digest a single meal.

Fact #441 · Animals

A lion's roar can be heard from several miles away.

Fact #439 · Animals

Some birds can fly at high altitudes over mountains.

Fact #323 · Animals

A cheetah can accelerate from 0 to 60 mph in a few seconds.

Fact #363 · Animals

Some species of octopus can change both color and texture.

Fact #343 · Animals

Some animals use camouflage to avoid predators.

Fact #336 · Animals

Many birds use Earth's magnetic field for navigation.

Fact #388 · Animals