Ecogeographical patterns in owl plumage colouration: climate and vegetation cover predict global colour variation

Arianna Passarotto, Arianna Passarotto, Emilio Rodríguez-Caballero, Ángel Cruz-Miralles & Jesús M. Avilés
Aim: Ecogeographical rules link animal colours, especially those produced by melanin pigments, with variation in environmental conditions over wide geographical scales. In particular, Gloger’s rule, coined in two versions for endothermic animals, suggests that tegument darkness would increase at high temperature, as well as in highly humid environments. On the other hand, the thermal melanism hypothesis, predicts that darker colourations should be more frequent in colder areas given their thermoregulation benefits. Location: Global Time period:...
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