Stacey and Koenig discuss the phenomenon of cooperative breeding among birds, an unusual kind of social behavior common to only a few hundred species worldwide, in which individuals other than the male-female pairs help to raise the young of a single nest or den. Because certain individuals aid in raising offspring which are not their own, cooperative breeding gives rise to some of the clearest examples of altruism among animals. This unique breeding behavior is of interest to evolutionary biologists and behavioral ecologists since such species exhibit some of the most unusual and bizarre...

Cooperative breeders are species in which more than two individuals participate in raising young at a single nest. Although relatively rare, this behavior entails dramatic forms of cooperation and competition, and provides important insights into many areas, including sexual selection, incest avoidance and other subjects. This book will be of interest to students and professionals interested in bird behavior and ecology.

Ever since the acorn woodpecker was observed and described by Spanish explorers, its behavior--particularly the unique habit of caching acorns in specialized storage trees or granaries--has impressed observers. Acorn woodpeckers are also one of the few temperate zone species in which young are reared communally in family groups. This demographic study investigates the complexities of acorn storage and group living in acorn woodpeckers at Hastings Reservation in central coastal California. It is one of the most thorough studies of any avian social system to date.