The helmeted woodpecker (Celeus galeatus ) is a species of bird in the family Picidae. It has been recorded from far northeastern Argentina, southeastern Brazil, and eastern Paraguay. Its habitat is subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest. It is threatened by habitat loss.
Adult birds are 27–28 cm (11 in) in length, with a long (3.15–3.5 cm (1.24–1.38 in)) bill that is wide at the base and shaped like a chisel. Its head, lores and ear coverts are cinnamon-coloured, brightening to red on the crown and crest. The mantle, wings, upper back and nape are brownish-black, the lower back is cream and the underparts barred black and cream.
The red crest, black back, and barred underside of the helmeted woodpecker resemble those of two larger woodpeckers—the lineated woodpecker (Dryocopus lineatus ) and the robust woodpecker (Campephilus robustus )—a form of mimicry which helps prevent attacks by other animals.
The helmeted woodpecker has been rated as vulnerable on the IUCN red list, as much of its habitat has been affected by deforestation and, although it is found across a large area, it is nowhere common. Its population is estimated at under 10,000 adult birds. The removal of forest has led to it vanishing from much of its range. Among others, a population is confirmed to exist in Iguazú National Park.