POLYBOROIDES

(Accipitridae; Ϯ African Harrier Hawk P. typus) Genus Polyborus Vieillot, 1816, caracara; Gr. -οιδης -oidēs  resembling. "Genus POLYBOROIDES. Smith.  Bill compressed particularly towards culmen, slightly arched from base, moderately hooked at the point; nostrils longitudinal, linear; cere smooth; sides of head to some distance behind eyes bare. Tarsi long, slender, laterally compressed and reticulated; toes long and slender, the middle one connected to the outer by a slight web at base; claws long, slender, and much curved. Wings nearly as long as tail; the fourth and fifth feathers the longest" (A. Smith 1834).
Var. PoloboroidesPolyporoides.
Synon. Gymnogenys.

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 www.hbw.com on 10 December 2018).