Nevertheless, in 2006, an adult female – probably during migration – was seen and photographed at the vicinity of Tapira, in the Minas Gerais cerrado: cf. Oliveira, Adilson Luiz de; Silva, Robson Silva e (2006). "Registro de Harpia (Harpia harpyja) no cerrado de Tapira, Minas Gerais, Brasil"(PDF). Revista Brasileira de Ornitologia. 14 (4): 433–434. Archived from the original(PDF) on November 2, 2010.
"Sponsorship and Exhibition at ATBC OTS"(PDF). International Conference Celebrating the 50th Anniversary of the Association for Tropical Biology and Conservation and the Organization for Tropical Studies. 23–27 June 2013, San José, Costa Rica. 2013. Archived from the original(PDF) on February 3, 2014.
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. 376. Archived from the original on 2023-12-08. Retrieved 2024-04-03.
Tozzer, Alfred M.; Allen, Glover M. Animal figures in the Maya codices. Archived from the original on 25 November 2021. Retrieved 25 November 2020 – via Biodiversity Heritage Library.
Tingay, Ruth E.; Katzner, Todd E. (23 February 2011). Rt-Eagle Watchers Z. Cornell University Press. pp. 167–. ISBN978-0-8014-5814-9. Archived from the original on 27 June 2014. Retrieved 22 October 2016.
Tingay, Ruth E.; Katzner, Todd E. (23 February 2011). Rt-Eagle Watchers Z. Cornell University Press. pp. 167–. ISBN978-0-8014-5814-9. Archived from the original on 27 June 2014. Retrieved 22 October 2016.
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. 376. Archived from the original on 2023-12-08. Retrieved 2024-04-03.
Nevertheless, in 2006, an adult female – probably during migration – was seen and photographed at the vicinity of Tapira, in the Minas Gerais cerrado: cf. Oliveira, Adilson Luiz de; Silva, Robson Silva e (2006). "Registro de Harpia (Harpia harpyja) no cerrado de Tapira, Minas Gerais, Brasil"(PDF). Revista Brasileira de Ornitologia. 14 (4): 433–434. Archived from the original(PDF) on November 2, 2010.
"Sponsorship and Exhibition at ATBC OTS"(PDF). International Conference Celebrating the 50th Anniversary of the Association for Tropical Biology and Conservation and the Organization for Tropical Studies. 23–27 June 2013, San José, Costa Rica. 2013. Archived from the original(PDF) on February 3, 2014.
Tozzer, Alfred M.; Allen, Glover M. Animal figures in the Maya codices. Archived from the original on 25 November 2021. Retrieved 25 November 2020 – via Biodiversity Heritage Library.