Describes the physical characteristics of different animals and explains why each has the features they do.

Offers photographs and information about mammals, birds, reptiles, amphibians, fishes, and invertebrates from throughout the world.

How do fish breathe and birds fly? Why do some animals migrate and others hibernate? And what happened to the dinosaurs and other animals that are now extinct?

At what elevation does an elk become a moose? Where can I find alpine flamingos? How do the elk know they're supposed to cross at the elk crossing signs? Where

#1 New York Times bestseller and USA Today bestseller The more we know about the animals in our world and the better we care for them, the better our lives will