(Accipitridae; Ϯ Crested Serpent Eagle S. cheela) Gr. σπιλος spilos  spot; ορνις ornis, ορνιθος ornithos  bird; "The first [Haematornis holospilus] is spotted all over the body, the second [H. bacha] only on the abdomen; while the third [H. undulatus = Spilornis cheela] is marked by spots on the wing-coverts, and by ocelli bearing an undulated appearance on the abdomen, the breast also being crossed by undulating fasciæ" (Vigors 1832); "SPILORNIS, n.  Hæmatornisb, Vigors.  Falco, Shaw.   S. Bacha, (Shaw,) n.  Levaill. Ois. d'Afr., pl. 15.  ...  bPreviously used by Mr. Swainson." (G. Gray 1840); "Spilornis G. R. Gray, List Gen. Bds., 1840, p. 3. Type, by original designation, Falco bacha Shaw; based on "Le Bacha" of Levaillant, ? 1797, Hist. Nast. Oiseaux Afrique, 1, p. 44, pl. 15 = Falco bassus J. R. Forster = Spilornis cheela subsp.  ...  Falco Bassus J. R. Forster, 1798, in Levaillant, Naturgeschichte Afr. Vögel, p. 55, pl. 15 — mountains of Great Namaqualand (corrected to Java by Sundevall, 1857, K. Svenska Vetenskaps-Acad. Handlingar, n.s., 2, no. 3, p. 25), is unidentifiable (cf. Gurney, 1878, Ibis, p. 100, and Stresemann, 1959, Journ. Ornith., 100, p. 355)." (Amadon in Peters 1979, 1, ed. 2, 311, 314).   
Synon. Bacha, Haematornis, Hypaetos, Ophaetus.

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 24 April 2019).