The blue-ringed octopus, small enough to fit in a palm, produces venom for which there is no antidote.

Certain insects can mimic leaves to avoid predators.

Fact #463 · Animals

Certain birds store food in hidden caches.

Fact #426 · Animals

Dragonflies can fly in all directions, including backward.

Fact #352 · Animals

An ostrich's eye is larger than its brain.

Fact #349 · Animals

A blue whale's tongue can weigh as much as an elephant.

Fact #443 · Animals

Some spiders use vibrations to detect trapped prey.

Fact #455 · Animals

A pangolin protects itself by curling into a tight ball.

Fact #543 · Animals

A blue whale's heart can weigh over 400 pounds.

Fact #104 · Animals