Results We found evidence for sexual dimorphism in all three colour-related nestling traits: males were on average brighter, more saturated (although here intersexual difference was marginally non-significant) and yellower (univariate analysis, Table S2 in File S1 ).
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Low cross-sex genetic correlation in carotenoid-based plumage traits in the blue tit nestlings (Cyanistes caeruleus).
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