The faster kangaroos hop, the less energy they use. Submitted by Paige Giraffes have black tongues. A cat has 32 muscles in each ear. An eagle can kill a young deer and fly away with it. Some frogs can be frozen solid, then thawed, and continue living.
Ostriches stick their heads in the sand to look for water.
A duck's quack has no echo. Cats can make over 100 vocal sounds, while dogs can only make 10. Texas horned toads can shoot blood out of the corners of their eyes. Honeybees have hair on their eyes. The only bird that can fly backwards is the Hummingbird.