The World of science

"What precisely is a warm-blooded animal, and how does it differ from other kinds of animals? This book defines the term, explains the differences and then discusses the different groups of animals, describing their behavior and characteristics"--Publisher.

"Part I of this volume examines the general characteristics of birds: how they fly, eat, smell and build nests. Part II discusses the traits and behavior of a wide variety of species from around the world. Includes a discussion of the conservation and protection of birds"--Publisher.