Strong evidence supporting a relationship between colour pattern and apparent survival in common crossbills
Keywords: 
Loxia
Colour and survival
Mediterranean crossbills
Carotenoids in birds
Issue Date: 
2021
Publisher: 
Springer
ISSN: 
2193-7192
Note: 
This article is licensed under a Creative Commons Attribution 4.0 International License
Citation: 
Fernández-Eslava, B. (Blanca); Alonso, D. (Daniel); Galicia-Paredes, D. (David); et al. "Strong evidence supporting a relationship between colour pattern and apparent survival in common crossbills". Journal of Ornithology. (163), 2021, 243 - 249
Abstract
Carotenoid staining has been repeatedly shown to serve as a sexually selected individual quality signal. In different species, individuals that show brighter carotenoid-based signals have been found to have superior feeding abilities, recover faster from disease, and generally enjoy better body condition. In the common crossbill (Loxia curvirostra), the colour has also been related to the different populations, with northern and central European populations being described as redder than those in the Mediterranean region. A study in the Pyrenees showed that long-winged individuals had lower apparent survival, and the proportion of red individuals was higher in long-winged birds, concluding that they could be nomadic birds (that travel long distances). A priori, if the red crossbills are more mobile than the yellow and orange ones, their apparent survival will be lower. However, in our study, red males showed a greater survival than males of other colours and almost double than that of the yellow ones. These results suggest that red coloration is linked to higher quality individuals regardless of their mobility

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