Robert S. Ridgely, John A. Gwynne: A Guide to the Birds of Panama: With Costa Rica, Nicaragua, and Honduras, s. 224. Princeton University Press, 1992. ISBN 978-0-691-02512-4. Kirja Googlen teoshaussa (viitattu 11.12.2013). (englanniksi)
iucnredlist.org
BirdLife International: Selasphorus ardensIUCN Red List of Threatened Species. Version 2013.2. 2013. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 11.12.2013. (englanniksi)