This classic textbook is a concise introductory guide to the subject of animal behavior. The book is organized by first building the four--cornered foundations of the subject, then moving higher. In an extremely well--organized progression, the student is lead to an understanding of the essential topics, explained in logical self--contained units. Each chapter ends with suggestions for further reading. In this second edition, the coverage of mechanisms of behavior is much expanded, as is the material on evolution and natural selection. The chapter on development includes much of the new work on learning and memory, especially song--learning in birds. Indeed throughout the book, examples are drawn from recent ground--breaking research.* The latest edition of the textbook of choice in animal behaviour* Extremely well illustrated and including many classic photos by Niko Tinbergen* Uniquely well suited as an introductory text -- designed for student use with a clear and logical organization founded on self--contained units