The Cinereous Tinamou is a dark, nearly unpatterned ground bird of the Amazonian lowlands. It is commonly recorded in floodplain and várzea forest.
It is about 30.5 cm long, with sooty gray plumage and a brownish crown. Its patterning is sparse, making it one of the darkest and most uniformly colored tinamous of the lowland Amazon.
It is common in lowland Amazonian floodplain and várzea forest. Records extend to about 1,000 m along the Andean foothills.
An extinction-risk assessment has not been added yet.