Cats may respond to their names when called.

Some frogs can change color depending on temperature or mood.

Fact #548 · Animals

Some species of penguins can swim at speeds of up to 15 miles per hour.

Fact #251 · Animals

Some frogs carry their tadpoles on their backs.

Fact #354 · Animals

Some birds build elaborate nests.

Fact #308 · Animals

Some sharks can reproduce without a mate in rare cases.

Fact #544 · Animals

Certain insects communicate using vibrations.

Fact #430 · Animals

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

Fact #443 · Animals

Certain birds of prey have exceptionally sharp vision.

Fact #434 · Animals