Ferguson-Lees, J. and Christie, D.A. 2001. Raptors of the world. Christopher Helm, London.
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Recommended citation
BirdLife International (2023) Species factsheet: Dryotriorchis spectabilis. Downloaded from
http://datazone.birdlife.org/species/factsheet/congo-serpent-eagle-dryotriorchis-spectabilis on 08/12/2023.
Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from
http://datazone.birdlife.org on 08/12/2023.