Sumatran Green-Pigeon Treron oxyurus

Relatively plain and unmarked green-pigeon with a long pointed tail. Males have a faint orange blush on the chest, though this can be hard to notice. Note blue-green bill and “goggles” in both sexes. Completely unmarked dark olive-green wings separate this species from other green-pigeons within its range; Wedge-tailed Green-Pigeon can be similar, but note that species’ much more thickset build and shorter tail. Endemic to the hill forests of Sumatra and western Java. Like other green-pigeons, gathers in fruiting trees. Gives rising and falling series of high-pitched coos, often with a hiccuping or sobbing quality.