Ducks and darkes

Chris Mead ()
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Chris Mead: The Nunnery, Hilborough

Nature, 2000, vol. 407, issue 6803, 461-461

Abstract: In parts of Europe, the white-headed duck is threatened as a species because females seem to prefer to mate with drakes of another, introduced species. Why? It turns out that males of a third species have an especially large penis: a speculative answer is that female white-headed ducks might favour similarly well-endowed males.

Date: 2000
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DOI: 10.1038/35035183

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