Why does the giraffe have a purple tongue? Why does the horned frog have such an enormous mouth? And what on earth is that growing on the star-nosed mole's face?
The odd features of these creatures are there for a good reason. But don't take our word for it.
We've assembled a group of unusual animals and asked them to explain why they look the way they do. In this book you can find out what they have to say for themselves.
Houghton Mifflin Harcourt