About Butastur liventer (Temminck, 1827)
The rufous-winged buzzard, with the scientific name Butastur liventer, is an Asian bird of prey. It is a resident breeding species found in Indochina, Java, and Sulawesi. It inhabits deciduous forest and second growth areas at elevations up to 800 meters. Adult rufous-winged buzzards measure 38 to 43 centimeters in length. They have grey heads and underparts, with light streaking on the crown, neck, and breast. The rest of their upperparts are rufous grey, and their uppertail is bright rufous. In flight, the upper side of the bird shows rufous-chestnut flight feathers and the rufous uppertail; from below, it has a grey body, white underwing coverts, and greyish flight feathers and undertail. This species is monomorphic, meaning there is no noticeable size or plumage difference between males and females. Juvenile rufous-winged buzzards are duller and browner than adults, with a brown-grey head and a white supercilium. This species is similar in size and overall shape to the migratory grey-faced buzzard, but the grey-faced buzzard has browner upperparts and tail, a white throat, and a white belly marked with brown bars, which distinguishes the two species. The diet of the rufous-winged buzzard consists of lizards, small mammals, and large insects. Its call is a shrill pit-piu.
