Chimpanzees have been observed making and using spears to hunt smaller primates.

Certain fish change sex during their lifetime.

Fact #503 · Animals

A peacock spreads its tail feathers during courtship displays.

Fact #466 · Animals

Whales are mammals and must breathe air.

Fact #265 · Animals

Some animals use echolocation to navigate in darkness.

Fact #278 · Animals

Some insects can lift many times their body weight.

Fact #213 · Animals

A hippopotamus can hold its breath underwater for several minutes.

Fact #433 · Animals

Some birds can fly at high altitudes over mountains.

Fact #323 · Animals

A sea sponge is an animal, not a plant.

Fact #541 · Animals