Horned Guan
Oreophasis derbianus
Large, long-tailed game bird restricted to undisturbed humid evergreen forest on a few high mountains in Guatemala and adjacent southern Chiapas, Mexico; very rare and local. Mainly found singly in forest canopy, where can be easily overlooked. Unmistakable: black and white overall with red horn on top of head and piercing whitish eyes.
Identification
The horned guan is 75 to 85 cm (30 to 33 in) long. Its most distictive feature is the tall, red, fleshy "horn" on its forehead. It has a small head, long strong legs, and a long broad tail. The sexes are alike in plumage but males have a taller horn and longer wings, tail, and legs than females. Adults have a glossy black head, neck, and upperparts with a bluish sheen. Their tail is black with a wide white band near its base. Their throat, breast, and upper belly are whitish with black flecks and their lower belly and flanks are brown. They have a small red dewlap, a white iris, a yellow bill, and red legs and feet. Juveniles resemble adults but are duller and have a smaller horn.
Taxonomy
The horned guan is not closely related to other guans, but merely resembles these birds in overall shape and color, whereas the horn is more reminiscent of the helmeted curassows. The species is the only survivor of a very ancient lineage of cracids that has been evolving independently from all other living members of this family for at least 20 million years, and possibly as much as 40 million years. Given that the basal relationships of the living cracids are not well resolved, the horned guan is often placed in its own subfamily Oreophasinae. Other taxonomists have placed it in either subfamily Cracinae or Penelopinae.<p>The holotype specimen of the horned guan is held in the collections of National Museums Liverpool at World Museum, with accession number NML-VZ D210. The specimen was collected from Volcán de Fuego, Guatemala by Don Joaquin Quinones circa 1843 and came to the Liverpool national collection via the 13th Earl of Derby’s collection which was bequeathed to the people of Liverpool.<p>The horned guan is monotypic.
- Scientific name
- Oreophasis derbianus
- Authority
- Gray, GR, 1844
- Order
- Galliformes
- Family
- Cracidae
- Genus
- Oreophasis
Range and habitat
The horned guan is found in the southern Mexican state of Chiapas, possibly in Oaxaca, and in southern Guatemala. Reports from Honduras have not been confirmed. Its distribution is not continuous but highly local. It inhabits humid subtropical montane evergreen forest, cloudforest, and pine-oak forest. Its habitat is characterized by much undergrowth of tree ferns, epiphytes, mosses, and vines. In elevation it mostly ranges between 2,300 and 3,100 m (7,500 and 10,200 ft) but locally occurs as low as 1,200 m (3,900 ft) and as high as 3,350 m (11,000 ft).
- Migration
- Resident species
Behavior
Migration pattern: Resident species.
Conservation
Population trend: declining.
- Population trend
- declining
Photos
Distribution
Bird Calls
Other Birds
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American Flamingo
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