Ferguson-Lees, J.; Christie, D.A. 2001. Raptors of the World. Christopher Helm, London.
IUCN. 2016. The IUCN Red List of Threatened Species. Version 2016-3. Available at: www.iucnredlist.org. (Accessed: 07 December 2016).
IUCN. 2019. The IUCN Red List of Threatened Species. Version 2019-3. Available at: www.iucnredlist.org. (Accessed: 10 December 2019).
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Recommended citation
BirdLife International (2022) Species factsheet: Harpagus diodon. Downloaded from
http://www.birdlife.org on 28/06/2022.
Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 28/06/2022.