The Bearded Helmetcrest (Oxypogon) is a genus of hummingbird in the family Trochilidae. It is found in Colombia and Venezuela. Its natural habitat is subtropical or tropical high-altitude grassland, known as páramo. 4 different species of this genus were recognized in 2014. 
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 Oxypogon linden measures 114 mm (4.5 in) in length, it is a small hummingbird with a very small 8 mm (0.3 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 Bearded Helmetcrest is found in the Andes, ranging from altitudes of 3600 to 4500 m (12000–15000 ft) in Venezuela, and 3200 to 5200 m (10500 to 17000 ft) in Colombia. Its main habitat is the páramo, but can descend to the treeline outside of breeding season.
The species breeds during the rainy season, and nests in in the daisy Espeletia or builds a nest of material from the daisy in a cliff or bank.
- McGuire, Jimmy A.; Witt Christopher C.; Remsen, J. V. Jr; Dudley R.; Altshuler, Douglas L. (2008). "A higher-level taxonomy for hummingbird". 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.