Birdlife International. 2016. Sagittarius serpentarius. The IUCN red list of threatened species [Internet]. Version 2018.1; e.T22696221A93549951 [species assessed 2016 Oct 01; page accessed 2018 Nov 06]. doi:10.2305/IUCN.UK.2016-3.RLTS.T22696221A93549951.en.
BirdLife International. 2020. Sagittarius serpentarius. The IUCN red list of threatened species [Internet]. Version 2024-1: e.T22696221A173647556. [assessed 2020 Apr 30; page accessed 2024 Aug 20]. https://dx.doi.org/10.2305/IUCN.UK.2020-3.RLTS.T22696221A173647556.en.
Brown, Leslie. 1972. African Birds of Prey. London: Collins.
Clements, J. F. 2007. The Clements Checklist of Birds of the World. Laboratory of Ornithology. Cornell University Press.
Dickinson, E. C. (ed.) 2003. The Howard & Moore Complete Checklist of the Birds of the World. 3rd Edition. Princeton University Press, Princeton, New Jersey.
Hackett, Shannon J., et al. June 27, 2008. A Phylogenomic Study of Birds Reveals Their Evolutionary History. Science Magazine, 320 (5884): 1763 – 1768.
Herholdt, J.J. & M.D. Anderson. November 2006. Observations on the population and breeding status of the African White-backed Vulture, the Black-chested Snake Eagle, and the secretarybird in the Kgalagadi Transfrontier Park. Ostrich, 77 (3-4): 127-135.
Kemp, A. C. 1994. Family Sagittariidae (Secretarybird), In del Hoyo, J., A. Elliott, & J. Sargatal, eds. Handbook of the Birds of the World. Vol. 2, Lynx Edicions, Barcelona. pp. 206-215
Kemp, A.C. 1995. Aspects of the breeding biology and behavior of the Secretarybird Sagittarius serpentarius near Pretoria, South Africa. Ostrich, 66: 61 - 68.
Kemp, Alan & Meg. 1974. Don’t forget the big birds. African Wildlife, 28 (2): 12 - 13.
Philips, James. R. Sept. 2000. A review and checklist of the parasitic mites (Acarina) of the Falconiformes and Strigiformes. The Journal of Raptor Research, 34 (3): 210 - 231.
Steyn, Peter. 1982. Birds of prey of southern Africa: their identification and life histories. Cape Town: David Philip.
Tarboton, Warwick R. 1990. African Birds of Prey. New York: Ithaca Cornell University Press.
Todd, William. 1988. Hand-rearing the Secretary bird at Oklahoma City Zoo. International Zoo Yearbook, 27: 258 - 262.
UNEP. 2019. Species+: Sagittarius serpentarius [online database]. Nairobi, Kenya: UNEP [compiled by UNEP-WCMC, Cambridge, UK]. [accessed 2019 Aug 06]. https://speciesplus.net/#/taxon_concepts/4551/legal
Wennrich, Gunter. 1984. First captive breeding of the Secretary bird at the Walsrode Bird Park. International Zoo Yearbook, 23: 64 - 66.
