Institute of Avian Research

Paler within the city: Carotenoid‐based colouration covaries negatively with the proportion of impervious surface in great tit ( Parus major ) territories across Europe

Urbanisation alters resource availability and exposes wildlife to novel environmental stressors, potentially driving phenotypic divergence. Carotenoid-based plumage colouration is a condition-dependent trait linked to dietary carotenoid acquisition and physiological allocation tr...