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Horned Guan (Orephasis derbianus)

Horned Guan Oreophasis derbianus
Immature Horned Guan Oreophasis derbianus.

Horned Guan is endemic to the highlands of western Guatemala and south-eastern Chiapas, Mexico. Knut Eisermann and Claudia Avendaño contributed to the knowledge on the distribution and natural history of Horned Guan in Guatemala.

  • Eisermann, K., A. Burge & G. López (2007) Nesting records of Horned Guan (Oreophasis derbianus) on Atitlán volcano, Guatemala. Bulletin of the IUCN / BIRDLIFE / WPA Cracid Specialist Group 23: 13-24. PDF
  • Eisermann, K. & C. Avendaño (2018) An update on the inventory, distribution and residency status of bird species in Guatemala. Bulletin British Ornithologists' Club 138: 148-229. PDF
juveniles of Horned Guan Oreophasis derbianus
a) Adult and immature Horned Guan on 8 November 2005. Note the rudimentary horn of the immature. b) Immature on 20 January 2006 (Photos by K. Eisermann). Figure 2 from Eisermann, K., A. Burge & G. López (2007) Nesting records of Horned Guan (Oreophasis derbianus) on Atitlán volcano, Guatemala. Bulletin of the IUCN / BIRDLIFE / WPA Cracid Specialist Group 23: 13-24.

Photographs of Horned Guan Oreophasis derbianus

juvenile of Horned Guan Oreophasis derbianus
Juvenile Horned Guan Oreophasis derbianus, c.2 weeks old, Volcán Atitlán, dpto. Sololá, 18 March 2007, Figure 5 from Eisermann, K. & C. Avendaño (2018) An update on the inventory, distribution and residency status of bird species in Guatemala. Bulletin British Ornithologists' Club 138: 148-229.
adult Horned Guan Oreophasis derbianus
Adult Horned Guan Oreophasis derbianus.
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