Derek Miller 
Wings, Legs, and Fins [PDF ebook] 

How do animals get around? This fun volume explores animal mobility and the interesting adaptations that allow animals to walk, fly, and swim in many different kinds of environments. This book considers how animals use movement to seek shelter, escape predators, and explore the world around them. Young readers will learn about these crucial components of animal bodies with simple language tailored to help them read on their own while discovering the various ways animals survive and thrive.