The Thicket Tinamou Crypturellus cinnamomeus is a type of Tinamou commonly found in lowlands of moist forest in subtropical and tropical regions up to 1,850 m altitude. It may also be found in dry forest habitats. This species ranges from Sinaloa, (coastal strip, western Mexico), as its most northerly range, to south Mexico, and eastern Mexico, (Gulf of Mexico), but not central Mexico), to north-west Costa Rica. It has an estimated global extent of occurrence of 600,000 km².
The Thicket Tinamou has many subspecies as follows:
- Nominate race (Crypturellus cinnamomeus cinnamomeus) occurs from El Salvador to Nicaragua
- Crypturellus cinnamomeus occidentalis occurs on the west Mexican coast
- Crypturellus cinnamomeus mexicanus occurs in north-east Mexico
- Crypturellus cinnamomeus sallaei occurs in southern Mexico
- Crypturellus cinnamomeus goldmani occurs in south-east Mexico and north Belize
- Crypturellus cinnamomeus soconuscensis occurs in central Chiapas
- Crypturellus cinnamomeus vicinior occurs from north Chiapas to central Honduras
- Crypturellus cinnamomeus delattrei occurs in Nicaragua
- Crypturellus cinnamomeus praepes occurs in north-west Costa Rica
The Thicket Tinamou is approximately 27 to 29 cm in length. Its upperparts brown, heavily barred blackish on back, rump and wings. Its lowerparts pale brown, cinnamon on breast, greyer on belly and undertail whitish with dark barring. Its head brown with prominent buff supercilium and well-defined ear covert patch with bill brownish and legs red in color. The species has a whistling voice ‘whoo-oo’.