![]() Here, we experimentally tested the relative importance of a genetic colour polymorphism in determining male dominance in the Gouldian finch ( Erythrura gouldiae), a species displaying three completely discrete but naturally co-occurring genetically inherited phenotypes yellow-, red- (carotenoid) and black-headed (melanin) morphs. ![]() Recent sexual selection studies on the evolution of bird colouration have mainly focused on signals with a high level of condition-dependent variation, with much less attention given to colour traits whose expression is genetically controlled.
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