The bearded helmetcrests (Oxypogon) are a genus of hummingbird in the family Trochilidae. They are found in Colombia and Venezuela. Primary natural habitat is subtropical or tropical high-altitude grassland, known as páramo. 4 different species of this genus were recognized in 2014.
- White-bearded helmetcrest, Oxypogon lindenii
- Green-bearded helmetcrest, Oxypogon guerinii
- Blue-bearded helmetcrest, Oxypogon cyanolaemus
- Buffy helmetcrest, Oxypogon stuebelii
The Oxypogon genus was first described by French ornithologist Auguste Boissonneau in 1840. A study of mitochondrial DNA of hummingbirds shows it to be most closely related to the bearded mountaineer (Oreonympha nobilis) and the rufous-capped thornbill (Chalcostigma ruficeps). The other member of the genus Chalcostigma lay outside the group, suggesting the genus might need revising in the future.
The most common species, the white-bearded helmetcrest measures 114 mm (4.5 in) in length, it is a small hummingbird with a very small 8 mm (0.31 in) bill. The adult male has a distinctive pointed black crest and a shaggy white beard. The face and cheeks are blackish, rendering a triangular shape with the white fronted crest and white beard. The underparts are a dull green-grey. The female lacks the beard and crest.
The species of bearded helmetcrests are found in the Andes, ranging from altitudes of 3,600 to 4,500 m (11,800 to 14,800 ft) in Venezuela, and 3,200 to 5,200 m (10,500 to 17,100 ft) in Colombia. Its main habitat is the páramo, but can descend to the treeline outside of breeding season.
- McGuire, Jimmy A.; Witt Christopher C.; Remsen, J. V. Jr; Dudley R.; Altshuler, Douglas L. (2008). "A higher-level taxonomy for hummingbird" (PDF). Journal of Ornithology. 150: 155–65. doi:10.1007/s10336-008-0330-x.
- Steven L. Hilty; Bill Brown (1986). A guide to the birds of Colombia. Princeton University Press. p. 295. ISBN 0-691-08372-X. Retrieved 12 June 2011.
- Steven L. Hilty; Rodolphe Meyer de Schauensee (2003). Birds of Venezuela. Princeton University Press. p. 432. ISBN 0-691-09250-8. Retrieved 12 June 2011.