Attributes / relations provided by
♦ 1König, C., F. Weick, & J.-H. Becking. 1999. Owls: A guide to the owls of the world. Yale Univ. Press, New Haven,
Connecticut
♦ 2del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.).
Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ 3Buechley ER, Santangeli A, Girardello M, et al.
Global raptor research and conservation priorities: Tropical raptors fall prey to knowledge gaps. Divers Distrib. 2019;25:856–869. https://doi.org/10.1111/ddi.12901