(syn. Falco Ϯ Aplomado Falcon F. femoralis) Gr. ῥυγχος  rhunkhos  bill; Late L. falco, falconis  falcon  < L. flectere  to curve; "Falco (Rhynchofalco1) femoralis Temm.  ...  Rhynchofalco Nobis.  Similar to Hypotriorchis, but frontal scutellæ of the tarsus and toes large, well-defined, and scarcely interrupted in the region of the digito-tarsal joint. Two outer primaries with inner webs cut. Bill very strong, the cere more elongated than in Hypotriorchis and allied subgenera, its length on top being about one-third the chord of the culmen.   Type, Falco femoralis Temminck." (Ridgway 1873).

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 13 December 2018).