This is the eleventh title in the author's successful series of books for this age level dealing with varieties of animal physiology and behavior. It is a more successful book than the recent Amazing Animal Appetites (P. 837 J-273) in both writing style and organization. He writes personally of things he has noticed about the feeding habits of mammals, birds and reptiles, mentions his reading and the puzzles nobody has yet solved. The chapters are divided into habitat rather than diet similarities, with ""Life Underground"" followed by ""Life on the Ground"" followed by ""Life Above Ground,"" etc. A final chapter gives some commonsense advice on feeding wild animals (and why not to, in some cases). Although both these books on animal appetites fail to synthesize the information they present, of the two, this is the more handily produced, written and illustrated by an established author.