olivaceous thornbill Chalcostigma olivaceum

Dark, short-billed hummingbird found at very high elevations in the Andes. Plumage is olive-green; adult male has a colorful “beard” that is reduced or lacking in females and immatures. It inhabits open grassland and areas with scattered shrubs above treeline. Unlike almost all other hummingbirds, it regularly lands on the ground to feed on tiny flowers protruding from the grass.