Helpers at Birds' Nests: A Worldwide Survey of Cooperative Breeding and Related Behavior
University of Iowa Press, 1987.
Status: Out of printFirst edition. Hardcover. 1987. First edition. As new hardcover in dust jacket. A detailed account of a remarkable aspect of bird behavior-the aid that one bird gives another who is neither its mate nor its dependent young, and who may even belong to a different species. 298 pages. As new / As New. Item #11878-1
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