Kemp, A. C. (1994). "Family Sagittariidae (Secretarybird)". In del Hoyo, J.; Elliott, A.; Sargatal, J. (eds.). Handbook of the Birds of the World. Vol. 2: New World Vultures to Guineafowl. Barcelona: Lynx Edicions. pp. 206–215. ISBN978-84-87334-15-3.
Waters, M. W. (1926). Cameos from the Kraal. Alice, South Africa: Lovedale Institution Press. pp. 55–56.
Sharpe, Richard Bowdler (1874). Catalogue of the Birds in the British Museum. Vol. 1. London: British Museum (Natural History). Department of Zoology. p. 45. Archived from the original on 17 October 2021. Retrieved 11 April 2020.
Hermann, Johann (1783). Tabula affinitatum animalium (in Latin). Argentorati [Strasbourg]: Printed by Joh. Georgii Treuttel. pp. 136, 235. Archived from the original on 27 November 2021. Retrieved 20 November 2019.
Ogilby, William (1835). "Genus Gypogeranus Ill". Proceedings of the Zoological Society of London. 3: 104–105. Archived from the original on 8 May 2022. Retrieved 12 April 2020.
Mayr, Ernst; Cottrell, G. William, eds. (1979). Check-list of Birds of the World. Vol. 1 (2nd ed.). Cambridge, Massachusetts: Museum of Comparative Zoology. p. 390. Archived from the original on 27 November 2021. Retrieved 25 November 2019.
Hackett, S. J.; Kimball, R. T.; Reddy, S.; Bowie, R. C. K.; Braun, E. L.; Braun, M. J.; Chojnowski, J. L.; Cox, W. A.; Han, K-L.; Harshman, J.; Huddleston, C. J.; Marks, B. D.; Miglia, K. J.; Moore, W. S.; Sheldon, F. H.; Steadman, D. W.; Witt, C. C.; Yuri, T. (2008). "A phylogenomic study of birds reveals their evolutionary history". Science. 320 (5884): 1763–1767. Bibcode:2008Sci...320.1763H. doi:10.1126/science.1157704. PMID18583609. S2CID6472805.
Walters, Michael (2009). "The identity of the birds depicted in Shaw and Miller's Cimelia physica". Archives of Natural History. 36 (2): 316–326. doi:10.3366/E0260954109001016.
Mourer-Chauviré, Cécile; Cheneval, Jacques (1983). "Les Sagittariidae fossiles (Aves, Accipitriformes) de l'Oligocène des phosphorites du Quercy et du Miocène inférieur de Saint-Gérand-le-Puy". Geobios (in French). 16 (4): 443–459. Bibcode:1983Geobi..16..443M. doi:10.1016/S0016-6995(83)80104-1.
Dean, W. R. J.; Milton, S. J.; Jeltsch, F. (1999). "Large trees, fertile islands, and birds in arid savanna". Journal of Arid Environments. 41 (1): 61–78. Bibcode:1999JArEn..41...61D. doi:10.1006/jare.1998.0455.
Greiner, Ellis C.; Kocan, A. A. (1977). "Leucocytozoon (Haemosporida; Leucocytozoidae) of the Falconiformes". Canadian Journal of Zoology. 55 (5): 761–770. Bibcode:1977CaJZ...55..761G. doi:10.1139/z77-099. PMID406030.
Valkiūnas, G.; Mobley, K.; Iezhova, T. A. (2016). "Hepatozoon ellisgreineri n. sp. (Hepatozoidae): description of the first avian apicomplexan blood parasite inhabiting granulocytes". Parasitology Research. 115 (2): 609–613. doi:10.1007/s00436-015-4777-4. PMID26472715. S2CID18151844.
Kemp, Alan C. (1995). "Aspects of the breeding biology and behaviour of the secretarybird Sagittarius serpentarius near Pretoria, South Africa". Ostrich. 66 (2–3): 61–68. Bibcode:1995Ostri..66...61K. doi:10.1080/00306525.1995.9633760.
Herholdt, J. J.; Anderson, M. D. (2006). "Observations on the population and breeding status of the African whitebacked vulture, the black-chested snake eagle, and the secretarybird in the Kgalagadi Transfrontier Park". Ostrich. 77 (3&4): 127–135. Bibcode:2006Ostri..77..127H. doi:10.2989/00306520609485523. S2CID85889249.
Mills, M. G. L.; Mills, M. E. J. (2014). "Cheetah cub survival revisited: a re-evaluation of the role of predation, especially by lions, and implications for conservation". Journal of Zoology. 292 (2): 136–141 [139]. doi:10.1111/jzo.12087.
Maloiy, G.; Warui, C. N.; Clemens, E. T. (1987). "Comparative gastrointestinal morphology of the Kori bustard and secretary bird". Zoo Biology. 6 (3): 243–251. doi:10.1002/zoo.1430060307.
Smith, Benjamin; Lewis-Williams, J. D.; Blundell, Geoffrey; Chippindale, Christopher (2000). "Archaeology and symbolism in the new South African coat of arms". Antiquity. 74 (285): 467–468. doi:10.1017/S0003598X00059688. S2CID162034040.
Galaty, John G. (1998). "The Maasai ornithorium: tropic flights of avian imagination in Africa". Ethnology. 37 (3): 227–238. doi:10.2307/3774014. JSTOR3774014.
Todd, William T. (1988). "Hand-rearing the secretary bird Sagitarius serpentarius at Oklahoma City Zoo". International Zoo Yearbook. 27 (1): 258–263. doi:10.1111/j.1748-1090.1988.tb03220.x.
Hackett, S. J.; Kimball, R. T.; Reddy, S.; Bowie, R. C. K.; Braun, E. L.; Braun, M. J.; Chojnowski, J. L.; Cox, W. A.; Han, K-L.; Harshman, J.; Huddleston, C. J.; Marks, B. D.; Miglia, K. J.; Moore, W. S.; Sheldon, F. H.; Steadman, D. W.; Witt, C. C.; Yuri, T. (2008). "A phylogenomic study of birds reveals their evolutionary history". Science. 320 (5884): 1763–1767. Bibcode:2008Sci...320.1763H. doi:10.1126/science.1157704. PMID18583609. S2CID6472805.
Mourer-Chauviré, Cécile; Cheneval, Jacques (1983). "Les Sagittariidae fossiles (Aves, Accipitriformes) de l'Oligocène des phosphorites du Quercy et du Miocène inférieur de Saint-Gérand-le-Puy". Geobios (in French). 16 (4): 443–459. Bibcode:1983Geobi..16..443M. doi:10.1016/S0016-6995(83)80104-1.
Dean, W. R. J.; Milton, S. J.; Jeltsch, F. (1999). "Large trees, fertile islands, and birds in arid savanna". Journal of Arid Environments. 41 (1): 61–78. Bibcode:1999JArEn..41...61D. doi:10.1006/jare.1998.0455.
Greiner, Ellis C.; Kocan, A. A. (1977). "Leucocytozoon (Haemosporida; Leucocytozoidae) of the Falconiformes". Canadian Journal of Zoology. 55 (5): 761–770. Bibcode:1977CaJZ...55..761G. doi:10.1139/z77-099. PMID406030.
Kemp, Alan C. (1995). "Aspects of the breeding biology and behaviour of the secretarybird Sagittarius serpentarius near Pretoria, South Africa". Ostrich. 66 (2–3): 61–68. Bibcode:1995Ostri..66...61K. doi:10.1080/00306525.1995.9633760.
Herholdt, J. J.; Anderson, M. D. (2006). "Observations on the population and breeding status of the African whitebacked vulture, the black-chested snake eagle, and the secretarybird in the Kgalagadi Transfrontier Park". Ostrich. 77 (3&4): 127–135. Bibcode:2006Ostri..77..127H. doi:10.2989/00306520609485523. S2CID85889249.
Galaty, John G. (1998). "The Maasai ornithorium: tropic flights of avian imagination in Africa". Ethnology. 37 (3): 227–238. doi:10.2307/3774014. JSTOR3774014.
longleat.co.uk
"A New Hatchling". www.longleat.co.uk. Archived from the original on 22 August 2024. Retrieved 22 August 2024.
nih.gov
pubmed.ncbi.nlm.nih.gov
Hackett, S. J.; Kimball, R. T.; Reddy, S.; Bowie, R. C. K.; Braun, E. L.; Braun, M. J.; Chojnowski, J. L.; Cox, W. A.; Han, K-L.; Harshman, J.; Huddleston, C. J.; Marks, B. D.; Miglia, K. J.; Moore, W. S.; Sheldon, F. H.; Steadman, D. W.; Witt, C. C.; Yuri, T. (2008). "A phylogenomic study of birds reveals their evolutionary history". Science. 320 (5884): 1763–1767. Bibcode:2008Sci...320.1763H. doi:10.1126/science.1157704. PMID18583609. S2CID6472805.
Greiner, Ellis C.; Kocan, A. A. (1977). "Leucocytozoon (Haemosporida; Leucocytozoidae) of the Falconiformes". Canadian Journal of Zoology. 55 (5): 761–770. Bibcode:1977CaJZ...55..761G. doi:10.1139/z77-099. PMID406030.
Valkiūnas, G.; Mobley, K.; Iezhova, T. A. (2016). "Hepatozoon ellisgreineri n. sp. (Hepatozoidae): description of the first avian apicomplexan blood parasite inhabiting granulocytes". Parasitology Research. 115 (2): 609–613. doi:10.1007/s00436-015-4777-4. PMID26472715. S2CID18151844.
Hackett, S. J.; Kimball, R. T.; Reddy, S.; Bowie, R. C. K.; Braun, E. L.; Braun, M. J.; Chojnowski, J. L.; Cox, W. A.; Han, K-L.; Harshman, J.; Huddleston, C. J.; Marks, B. D.; Miglia, K. J.; Moore, W. S.; Sheldon, F. H.; Steadman, D. W.; Witt, C. C.; Yuri, T. (2008). "A phylogenomic study of birds reveals their evolutionary history". Science. 320 (5884): 1763–1767. Bibcode:2008Sci...320.1763H. doi:10.1126/science.1157704. PMID18583609. S2CID6472805.
Valkiūnas, G.; Mobley, K.; Iezhova, T. A. (2016). "Hepatozoon ellisgreineri n. sp. (Hepatozoidae): description of the first avian apicomplexan blood parasite inhabiting granulocytes". Parasitology Research. 115 (2): 609–613. doi:10.1007/s00436-015-4777-4. PMID26472715. S2CID18151844.
Herholdt, J. J.; Anderson, M. D. (2006). "Observations on the population and breeding status of the African whitebacked vulture, the black-chested snake eagle, and the secretarybird in the Kgalagadi Transfrontier Park". Ostrich. 77 (3&4): 127–135. Bibcode:2006Ostri..77..127H. doi:10.2989/00306520609485523. S2CID85889249.
Smith, Benjamin; Lewis-Williams, J. D.; Blundell, Geoffrey; Chippindale, Christopher (2000). "Archaeology and symbolism in the new South African coat of arms". Antiquity. 74 (285): 467–468. doi:10.1017/S0003598X00059688. S2CID162034040.
Clench, Mary H.; Mathias, John R. (1995). "The avian cecum: a review"(PDF). Wilson Bulletin. 107 (1): 93–121 [100–101].
web.archive.org
Sharpe, Richard Bowdler (1874). Catalogue of the Birds in the British Museum. Vol. 1. London: British Museum (Natural History). Department of Zoology. p. 45. Archived from the original on 17 October 2021. Retrieved 11 April 2020.
Hermann, Johann (1783). Tabula affinitatum animalium (in Latin). Argentorati [Strasbourg]: Printed by Joh. Georgii Treuttel. pp. 136, 235. Archived from the original on 27 November 2021. Retrieved 20 November 2019.
Ogilby, William (1835). "Genus Gypogeranus Ill". Proceedings of the Zoological Society of London. 3: 104–105. Archived from the original on 8 May 2022. Retrieved 12 April 2020.
Mayr, Ernst; Cottrell, G. William, eds. (1979). Check-list of Birds of the World. Vol. 1 (2nd ed.). Cambridge, Massachusetts: Museum of Comparative Zoology. p. 390. Archived from the original on 27 November 2021. Retrieved 25 November 2019.