Carotenoid-based nestling colouration and parental favouritism in the great tit

  title={Carotenoid-based nestling colouration and parental favouritism in the great tit},
  author={Barbara Tschirren and Patrick S. Fitze and Heinz Richner},
While elaborate carotenoid-based traits in adult birds may have evolved as honest signals of individual quality in the context of sexual selection or other social interactions, the function of carotenoid-based colours in juveniles is less well understood. We investigated the hypothesis that carotenoid-based nestling colouration has evolved in response to parental preference of intensely coloured offspring during food provisioning. In a field experiment, we manipulated nestling plumage… CONTINUE READING
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