The brown tinamou (Crypturellus obsoletus ) is a brownish ground bird found in humid lowland and montane forest in tropical and subtropical South America.
Crypturellus is formed from three Latin or Greek words. kruptos meaning covered or hidden, oura meaning tail, and ellus meaning diminutive. Therefore, Crypturellus means small hidden tail.
The brown tinamou is approximately 25 to 30 cm (9.8–11.8 in) in length and it weighs about 350 to 550 g (12–19 oz). Depending on the subspecies involved, the upperparts vary from dark sooty-brown to bright chestnut and the underparts, which usually are paler than the upperparts, vary from chestnut to light ochraceous. The subspecies griseiventris is unique in having pale buff-grey underparts. All subspecies can be separated from the superficially similar little tinamou by the greyish (rather than whitish) throat. Females are typically larger and more rufescent than the males.
The brown tinamou is located in northern Venezuela, Colombia, Ecuador, Peru, northern and southern Brazil, extreme northeastern Argentina, eastern Bolivia, and eastern Paraguay. They may also be in Uruguay.
They live in tropical and sub-tropical moist lowland and montane forests, preferring elevations between 1,300 to 2,900 m (4,300–9,500 ft).
As other tinamous of its genus, it is a shy, ground-dwelling species, which usually is encountered singly or in pairs. It feeds on fruits, insects, and seeds. The female lays 4-5 deep pink to dark glossy brown eggs on the ground; typically in a small depression at the base of a tree. Its song consists of loud, high-pitches whistles, but exact structure and timbre vary over its range.
