Differential visual ornamentation between brood parasitic and parental cuckoos.

Abstract excerpt

The evolution of brood parasitism should affect adult phenotypic traits due to sexual selection as well as the parasite-host interactions, although it is rarely focused on. Sexual selection theory predicts extravagant secondary sexual characteristics in brood parasites whereas immature-like modest sexual characteristics in parental species. This is because juvenile-like immature traits can attract mates by...

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