The white-throated caracara or Darwin's caracara (Phalcoboenus albogularis) is a species of bird of prey in the family Falconidae, the falcons and caracaras. It is found in Argentina and Chile. Taxonomy and systematics The white-throated caracara is a member of order Falconiformes, which different taxonomic systems assign 65 or 66 species; 10, 11 or 12 genera; and two or three subfamilies. The caracaras contributes the most to the differences. The American Ornithological Society, the International Ornithological Committee, and BirdLife International's Handbook of the Birds of the World place the white-throated caracara in genus Phalcoboenus. The Clements taxonomy places it in genus Daptrius. The four systems differ on the genera of several other caracaras as well. The white-throated caracara and the carunculated caracara (P. carunculatus) were formerly treated as subspecies of the mountain caracara (P. megalopterus) but the three are now considered a superspecies due to their shallow genetic differences. Possible hybrids between the white-throated and mountain caracaras have been reported but not widely accepted. Taxonomic systems agree that the white-throated caracara is monotypic. Description The white-throated caracara is long with a wingspan of . It has a small crest, long wings with clear "fingers" on the tips, and a long rounded tail. The sexes' plumages are alike. Adults' upperparts are mostly brownish black to black with white uppertail coverts. Their underparts and tips of the tail feathers are pure unmarked white. The undersides of their primaries have black and white bands at their base. Their bare facial skin is yellow-orange, their iris is hazel to brown, and their legs and feet yellow. Juveniles have dark brown upperparts and bluish white facial skin, legs, and feet. Distribution and habitat The white-throated caracara is the southernmost member of the "mountain caracara" superspecies. It is found from south-central Chile's Los Lagos Region and western Argentina's Mendoza Province south to Tierra del Fuego and Cape Horn. It inhabits open mountain slopes, southern beech (Nothofagus) forest, open woodland, and dense scrublands. In Chile it ranges in elevation from about and in Argentina from sea level to . Behavior Movement The white-throated caracara's movements are imperfectly known; the species is thought to be somewhat nomadic. Feeding Information is sparse on the white-throated caracara's diet and foraging behavior. It is known to feed on carrion, for instance dead guanaco (Lama guanicoe) and cattle, and has also been documented preying on small rodents. Small numbers gather with vultures