Certain fish change sex during their lifetime.

The ozone layer is located in the stratosphere.

Fact #140 · Animals

Some birds can fly at high altitudes over mountains.

Fact #323 · Animals

A hummingbird can hover in place while feeding.

Fact #484 · Animals

Pterosaurs were flying reptiles, not dinosaurs.

Fact #628 · Animals

Certain ants build floating rafts during floods.

Fact #387 · Animals

Some reptiles can survive long periods without food.

Fact #501 · Animals

Some species of spiders can survive underwater for short periods.

Fact #414 · Animals

Some insects have lifespans of only a few hours as adults.

Fact #411 · Animals