Are the ratios of bill crossing morphs in crossbills the...

Are the ratios of bill crossing morphs in crossbills the result of frequency-dependent selection?

Craig W. Benkman
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Volume:
10
Language:
english
Pages:
8
DOI:
10.1007/bf01239352
Date:
January, 1996
File:
PDF, 553 KB
english, 1996
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