(Accipitridae; Ϯ Double-toothed Kite H. bidentatus) L. harpago  rapacious person, harpy < Gr. ἁρπαζω harpazō  to seize or carry off by violence (cf. Harpagus (6th cent. BC) Persian general who was forced to eat the flesh of his own son); "And although I do not in general wish to increase the number of genera belonging to the present family [Falconidae], until we have attained a more extensive and accurate knowledge of the species, I feel obliged for the sake of perspicuity to adopt the following genus, of which the type is the F. bidentatus, Lath.  HARPAGUS.  The essential characteristick of this group is the double tooth on both the upper and lower mandible. The wings, which correspond with those of the other Hawks, in being one third shorter than the tail, have the third and fourth quill feathers, which are the longest, of equal length. The tarsi are of moderate length and strength, and have the acrotarsia scutellated as in the latter groups of the present stirps [Accipitrina]. The nares are of a semicircular form, and the cere is naked. The F. Diodon of M. Temminck is to be referred to this genus" (Vigors 1824).
Synon. Bidens, Diodon, Diplodon.

Search for more names on the Key to Scientific Names in Ornithology by James A. Jobling.
Recommended citation
Jobling, J. A. (2019). Key to Scientific Names in Ornithology. In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.) (2019). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from www.hbw.com on 16 January 2019).