About Coturnix coromandelica (J.F.Gmelin, 1789)
This species, the rain quail (scientific name Coturnix coromandelica (J.F.Gmelin, 1789)), can be distinguished by the lack of barring on its primary feathers. Adult males have a black patch on the breast and a distinctive black-and-white head pattern. Females are hard to tell apart from female common quail and female Japanese quail, though the spots on a rain quail female's breast are more delicate. The species measures 6–6.5 inches (15–17 cm) in length and weighs approximately 2.25–2.5 ounces (64–71 g). Its call consists of a pair of metallic, constantly repeated quit-quit notes; it is given regularly in mornings and evenings, and also during nights in the breeding season. This call is clearly distinct from the call of the common grey quail. The rain quail inhabits grassland, cultivated fields, and scrub in the Indus valley of central Bangladesh, India, Nepal, and Pakistan. Its range extends across the Gangetic plains and into parts of peninsular continental India. It is mostly found in more southern areas during winter.