The Bearded Helmetcrest (Oxypogon guerinii) - also known as Linden's Helmetcrest - is a large hummingbird native to the Andes mountain range that runs along the western coast of South America. In Venezuela, they are found at altitudes of 12,000 - 15,000 feet (3,600 - 4,500 meters) and in Colombia at 10,500 - 17,000 feet (3,200 - 5,200 meters). Bearded Helmetcrests are easily identified by the long, pointed crests and black and white beards. The face is black except for a blue, green or orange central stripe. There is a pale collar around the face down to the chest. The female lacks the beard and crest. First described by French ornithologist Auguste Boissonneau in 1840, it is the only member of the genus Oxypogon.