1. AHT International (2000) Diseño de un sistema de monitoreo y evaluación de indicadores biológicos para las áreas protegidas del sur de Petén. SEGEPLAN-PROSELVA, Guatemala (Unpublished report)
2. American Birding Association (2016) American birding association code of birding ethics.
http://listing.aba.org/ethics/
. Accessed 16 Oct 2016
3. American Museum of Natural History (2013a) AMNH bird collection. Record ID: SKIN-813288. Source:
http://ipt.vertnet.org:8080/ipt/resource.do?r=amnh_birds
(source published on 2013-10-30). Accessed 22 Nov 2016
4. American Museum of Natural History (2013b) AMNH bird collection. Record ID: SKIN-813289. Source:
http://ipt.vertnet.org:8080/ipt/resource.do?r=amnh_birds
(source published on 2013-10-30). Accessed 22 Nov 2016
5. AOU (1998) The American Ornithologists’ Union check-list of North American birds, 7th edn. American Ornithologists' Union, Washington, DC