The Sulawesi hawk-eagle (Nisaetus lanceolatus) (earlier placed under Spizaetus), also known as Celebes hawk-eagle, is a medium-sized, approximately 64 cm (25 in) long, crestless brown raptor in the family Accipitridae. The adults have rufous-brown, boldly marked head and chest feathers, dark brown wings and black-barred white below. The young has white head and underparts.
An Indonesian endemic, the Sulawesi hawk-eagle is distributed in rainforests of Sulawesi and its satellite islands of Buton, Muna, Banggai and Sula Islands. The diet consists mainly of birds, lizards, snakes and mammals.
- Helbig, AJ; Kocum, A; Seibold, I & Braun, MJ (2005). "A multi-gene phylogeny of aquiline eagles (Aves: Accipitriformes) reveals extensive paraphyly at the genus level" (PDF). Molecular Phylogenetics and Evolution. 35 (1): 147–164. doi:10.1016/j.ympev.2004.10.003.
- BirdLife International (2012). "Nisaetus lanceolatus". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.