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lighthouses
Harting catalogues 378 titles in nineteen languages
and sexing birds and 45 pages of Literature Cited round out this robust volume
guide resident and visiting birders to hundreds of birding sites
Helpers at Birds' Nests: A Worldwide Survey of Cooperative Breeding and Related Behavior lighthouses1987. 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.
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