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Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/52772 on 28 March 2019).
Karte: San Jose, 1 April 2007, adapted by Chumwa, 6 May 2008
[GFDL or CC-BY-SA-3.0], via Wikimedia Commons