Houston, D.C. (1994). "Family Cathartidae (New World vultures)". In del Hoyo, Josep; Elliott, Andrew; Sargatal, Jordi (') (eds.). Volume 2: New World Vultures to Guineafowl of Handbook of the Birds of the World. Barcelona: Lynx edicions. pp. 24–41. ISBN84-87334-15-6.
"Vulture, King Studbook". AZA website. Silver Spring, MD: Association of Zoos and Aquariums. 2010. Archived from the original on 4 September 2011. Retrieved 15 November 2010. (subscription required)
Tagliarini, Marcella Mergulhão; Pieczarka, Julio Cesar; Nagamachi, Cleusa Yoshiko; Rissino, Jorge; de Oliveira, Edivaldo Herculano C. (2009). "Chromosomal analysis in Cathartidae: distribution of heterochromatic blocks and rDNA, and phylogenetic considerations". Genetica. 135 (3): 299–304. doi:10.1007/s10709-008-9278-2. PMID18504528. S2CID22786201.
Schlee, Marsha A. (1994). "Reproductive Biology in King Vultures at the Paris Menagerie". International Zoo Yearbook. 33 (1): 159–75. doi:10.1111/j.1748-1090.1994.tb03570.x.
Remsen, J. V. Jr.; C. D. Cadena; A. Jaramillo; M. Nores; J. F. Pacheco; M. B. Robbins; T. S. Schulenberg; F. G. Stiles; D. F. Stotz & K. J. Zimmer. 2007. A classification of the bird species of South America.Archived 2009-03-02 at the Wayback Machine South American Classification Committee. Retrieved on 15 October 2007
nationalgeographic.com
animals.nationalgeographic.com
"King Vulture". National Geographic. Archived from the original on July 3, 2007. Retrieved 11 September 2007.
Tagliarini, Marcella Mergulhão; Pieczarka, Julio Cesar; Nagamachi, Cleusa Yoshiko; Rissino, Jorge; de Oliveira, Edivaldo Herculano C. (2009). "Chromosomal analysis in Cathartidae: distribution of heterochromatic blocks and rDNA, and phylogenetic considerations". Genetica. 135 (3): 299–304. doi:10.1007/s10709-008-9278-2. PMID18504528. S2CID22786201.
Tagliarini, Marcella Mergulhão; Pieczarka, Julio Cesar; Nagamachi, Cleusa Yoshiko; Rissino, Jorge; de Oliveira, Edivaldo Herculano C. (2009). "Chromosomal analysis in Cathartidae: distribution of heterochromatic blocks and rDNA, and phylogenetic considerations". Genetica. 135 (3): 299–304. doi:10.1007/s10709-008-9278-2. PMID18504528. S2CID22786201.
"King Vulture". National Geographic. Archived from the original on July 3, 2007. Retrieved 11 September 2007.
Remsen, J. V. Jr.; C. D. Cadena; A. Jaramillo; M. Nores; J. F. Pacheco; M. B. Robbins; T. S. Schulenberg; F. G. Stiles; D. F. Stotz & K. J. Zimmer. 2007. A classification of the bird species of South America.Archived 2009-03-02 at the Wayback Machine South American Classification Committee. Retrieved on 15 October 2007
"King Vulture". Bird Stamps. Archived from the original on November 17, 2000. Retrieved 17 October 2007.{{cite web}}: CS1 maint: unfit URL (link)
"Vulture, King Studbook". AZA website. Silver Spring, MD: Association of Zoos and Aquariums. 2010. Archived from the original on 4 September 2011. Retrieved 15 November 2010. (subscription required)
de Roy, Tui (1998). "King of the Jungle". International Wildlife (28): 52–57. ISSN0020-9112.
zoonomen.net
Peterson, Alan P. (23 December 2007). "Richmond Index – Genera Aaptus – Zygodactylus". The Richmond Index. Division of Birds at the National Museum of Natural History. Retrieved 17 January 2008.