Dusky-headed Parakeet is a relatively large and long-tailed parakeet restricted to the lowlands of western Amazonia, where it occurs from southeast Colombia south to northeast Bolivia, and across western Brazil. It remains generally common, and the species seems to have adapted to some degree of habitat degradation and fragmentation. Most of its plumage is green, but this parakeet is distinctive on account of the brownish-gray head and neck, with a slightly scaled effect, which make the species easily identifiable. It inhabits clearings and riparian areas, including seasonally flooded forest, but apparently large shuns terra firme forest, and feeds on range of fruits and flowers. It sometimes forms large flocks, which may perform local movements in response to changes in food supplies.