(Accipitridae; Ϯ White-headed Vulture T. occipitalis) L. trigonum  triangle  < Gr. τριγονον trigōnon  triangle  <τρεις treis, τριων triōn  three; γωνια gōnia  angle; -ceps  -headed  < caput, capitis  head;  "Adult - top of head covered with a thick cushion of white down, forming a distinctive triangular silhouette" (Brown & Amadon 1968); "6e Sous-genre: TRIGONOCEPS, Lesson.   25. Trigonoceps occipitalis; Vultur occipitalis, Burchell, Voy.; Vautour chincou, Temm., pl. 13; Rupp., Voy. pl. 22 (adulte); Bruce, Voy.; Proc. 1, 13, 69 et 169; Vultur abyssinicus, Lath.   Hab. le Sénégal, l'Abyssinie, le cap de Bonne-Espérance." (Lesson 1842); "Trigonoceps Lesson, Écho du Monde Savant (2), 6, 1842, col. 1038. Type, by monotypy, Vultur occipitalis Burchell." (Peters 1931, 1, 260).
Synon. Lophogyps.

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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 on 20 January 2019).