The black-fronted piping guan is 63.5 to 74 cm (2.08 to 2.43 ft) long and weighs 1,100 to 1,400 g (2.4 to 3.1 lb). It is similar in general appearance to a slim turkey, with a thin neck and small head. It is mainly black with a bluish gloss and a conspicuous white wing patch bearing rows of black dots. It has a large white crest and a red throat wattle with a dark blue patch at the front. Its ring of bare white skin around the dark eye and black-feathered face and forehead are unique in its genus. The legs and feet are red.
Though it was formerly more widespread, the black-fronted piping guan is now found spottily in two general areas. It ranges near the Brazilian coast roughly from Paraná state north to Rio de Janeiro and also in Argentina's far northeastern Misiones Province and adjacent eastern Paraguay. It is the only piping guan in this range though formerly it overlapped a small amount with blue-throated piping guan (P. cumanensis ) in Paraguay. It inhabits several types of Atlantic Forest including evergreen, gallery, and coastal. It is almost always found in mature primary forest though also in older secondary forest and restinga. In elevation it formerly ranged from sea level as high as 1,850 m (6,070 ft) but now is usually found only below 1,000 m (3,300 ft)
Some altitudinal and seasonal movements by the black-fronted piping guan have been documented, though the reasons for them are not clear.
The black-fronted piping guan forages alone, in pairs, or in groups as large as 11, usually in trees but sometimes on the ground. Its diet is primarily fruit, and studies in Brazil have documented 41 species eaten there. It will occasionally eat seeds, buds, insects, and molluscs. It tends to remain in an area of fruiting trees until they are bare.
The black-fronted piping guan's breeding season appears to span at least August to December based on the dates of observations of displays, eggs, and nestlings. Their nest is a platform made of twigs and stems placed in the fork of a tree. The clutch size is two to four eggs. Almost all incubation is by the female but both sexes provision young.
The IUCN assessed the black-fronted piping-guan in 1988 as Threatened, then in 1994 as Vulnerable, and since 2004 as Endangered. Its range and population have been severely reduced by habitat destruction and hunting and it is now rare outside of a few protected areas. Even in protected areas poaching for food and feathers remains a problem.
