The pangolin is the only mammal covered in scales — made of keratin, like human fingernails.

Certain reptiles regulate body temperature through basking.

Fact #527 · Animals

Certain birds use thermal air currents to glide efficiently.

Fact #499 · Animals

Some snakes shed their skin multiple times a year.

Fact #485 · Animals

Certain frogs are poisonous to predators.

Fact #418 · Animals

Octopuses have three hearts and blue blood.

Fact #1 · Animals

A wolf can travel dozens of miles in a single day.

Fact #545 · Animals

A great horned owl has powerful talons for hunting.

Fact #449 · Animals

Certain birds build nests on cliffs for protection.

Fact #531 · Animals