Melanin-based colour polymorphism signals aggressive personality in nest and territory defence in the tawny owl (Strix aluco)
Da Silva A., van den Brink V., Emaresi G., Luzio E., Bize P., Dreiss A.N., Roulin A., 2013. Behavioral Ecology and Sociobiology, 67 (7) pp. 1041-1052. Peer-reviewed.