(syn. Chelictinia Ϯ African Swallow-tailed Kite C. riocourii) L. nauclerus  sailing-master, commander  < Gr. ναυκληρος nauklēros  captain  < ναυς naus, νεως neōs  ship; "NAUCLERUS.  ...  Nauclerus is distinguished from the true Milvus by the greater developement of the character of the forked tail; by the relative proportions of the wing feathers, the fourth being the longest in Milvus; and by the reticulation of the acrotarsia, those of Milvus being covered with even scales or scutellated.  ...  In consequence of these characters N. Riocourii comes most nearly to the group of Elanus, while N. furcatus shows an approximation to the true Milvus" (Vigors 1825).

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 14 December 2018).