The white-winged guan (Penelope albipennis) is a bird in the chachalaca, guan and curassow family Cracidae. It is endemic to northwestern Peru. History The white-winged guan was originally known from three specimens collected in 1876 and 1877. It was not positively seen again until 1977, though there had been hints of its continued existence in 1969. Surveys from about 1980 on found individuals in many other locations than the 1977 sightings, though still within a small area. Taxonomy and systematics At various times the white-winged guan has been considered closely related to the crested guan (Penelope purpurascens), Cauca guan (P. perspicax), Spix's guan (P. jacquacu), and dusky-legged guan (P. obscura). It was also treated as a color morph of Baudo guan (P. ortoni). More recent evidence confirms that it is a species in its own right and most closely related to either or both of crested guan and band-tailed guan (P. argyrotis). The white-winged guan is monotypic. Description The white-winged guan has an average length of and average weight of . It has blackish brown plumage overlain by a green gloss. Much of its forepart has short whitish or pale gray streaks. Its white primaries show as a slash on the folded wing. Its reddish eye is surrounded by bare purple skin, its bill is dark gray with a black tip, and it has an orange dewlap. Distribution and habitat The white-winged guan is now found only in the departments of Lambayeque, Cajamarca, and Piura in northwestern Peru. It is confined to an area that is at most long and wide and is divided by a major road and its accompanying human settlement. The 1876 specimen had been collected much further north than the current known area. The white-winged guan inhabits a very specialized landscape, small forested ravines and nearby slopes on the west side of the Andes. In elevation it generally ranges between but has been reported as low as and as high as . Behavior Movement The white-winged guan typically begins calling before dawn and at first light moves from overnight roosts to feed until about 9:00. They are then mostly sedentary until late afternoon, when they typically feed again before roosting for the night. Feeding The white-winged guan is usually found in pairs or family groups, though several groups commonly will feed in one fruiting tree. It eats fruits, flowers, leaves, and seeds. Fruits of Ficus figs