A blue whale's heart is large enough for a human to swim through its major arteries.

Snow leopards use their long tails for balance.

Fact #371 · Animals

Certain birds perform elaborate mating dances.

Fact #507 · Animals

A sea lion can hold its breath for several minutes underwater.

Fact #400 · Animals

A hawk has sharp vision adapted for hunting.

Fact #496 · Animals

Certain fish change sex during their lifetime.

Fact #503 · Animals

A group of wolves is called a pack.

Fact #112 · Animals

Certain birds store food in hidden caches.

Fact #426 · Animals

Some frogs carry their tadpoles on their backs.

Fact #354 · Animals