Ducks, Geese, and Swans of the World
Books / Hardcover
ISBN: 0803209533 / Publisher: University of Nebraska Press, October 1978
Systematic review classifying waterfowl according to thirteen tribes and identifying species accordi...
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Systematic review classifying waterfowl according to thirteen tribes and identifying species according to age, sex and plumage, also considering habitats, feeding, current distribution and status, reproduction and especially social behavior
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