(syn. Ketupa Ϯ Tawny Fish Owl K. flavipes) L. cultratus  knife-shaped  < culter, cultri  knife; unguis  claw, talon; "Genus new. Cultrunguis, Mihi.  ... Talons medial, stout, subequal, compressed, cultrated below*.  ... *Hence the generic name, cultratus and unguis.  ... [plate] Cultrunguis Flavipes-with Nigripes type of the Genus Cultrunguis" (Hodgson 1836).  Var. Cultriunguis.

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2018). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2018). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 12 December 2018).