del Hoyo, J.; Elliott, A.; Sargatal, J. 1999. Handbook of the Birds of the World, vol. 5: Barn-owls to Hummingbirds. Lynx Edicions, Barcelona, Spain.
Underwood, C. F. 1896. A lis of birds collected or observed on the lower, southern and south-western slopes of the volcano of Miravalles and on the lower lands extending to Bagaces in Costa Rica, with a few observations on their habits. Ibis: 431-451.
Weller, A.A. & Boesman, P. 2017. Indigo-capped Hummingbird (Amazilia cyanifrons). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. Available at: http://www.hbw.com/node/55507.
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Recommended citation
BirdLife International (2024) Species factsheet: Indigo-capped Hummingbird Amazilia cyanifrons. Downloaded from
https://datazone.birdlife.org/species/factsheet/indigo-capped-hummingbird-amazilia-cyanifrons on 29/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 29/12/2024.