Attributes / relations provided by
♦ 1del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.).
Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ 2DIET COMPOSITION OF THE LONG-EARED OWL IN SLOVENIA: SEASONAL VARIATION IN PREY USE, DAVORIN TOME, J Raptor Res. 28(4):253-258