Begging calls and mouth colouration as predictors of breeding success in blue tits
P. Melero‐Romero,
J. Garrido‐Bautista,
L. Pérez‐Rodríguez
et al.
Abstract:Nestlings normally exhibit a mix of traits that attract parental care, such as postural and vocal begging and carotenoid‐based mouth colouration. These signals are hypothesised to be signs of nestling needs (vocal begging) and quality (mouth colouration). Therefore, we hypothesised that broods, where nestlings beg for less time and display more saturated carotenoid‐based mouth colouration, would have lower nestling mortality. We tested these predictions in two wild blue tit (Cyanistes caeruleus) populations. T… Show more
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