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Increased plumage darkness of female Shiny Cowbirds Molothrus bonariensis in the subtropics: an adaptation to bacterial degradation?

Bettina Mahler, Auteur ; Nancy I. Lopez, Auteur ; Alejandro G. Di Giacomo, Auteur ; Juan C. Reboreda, Auteur

Dans Ibis (152(4) OCT 2010)

The Shiny Cowbird Molothrus bonariensis is a sexually dichromatic species, in which males have blackish-blue iridescence and females are dull brown. However, in some subtropical parts of its distribution, females show a plumage polymorphism that[...]

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