Product Description: 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...read more (view table of contents, read Amazon.com's description)

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Product Description: 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...read more