The Swainson’s Hawk (Buteo swainsoni) inhabits in winters in South America, north Costa Rica and Florida. It migrates in sky-spanning flocks in big groups, and roost in trees or on open ground. Its size is of 53 cm (21 inches) in height and 1 kg in weight.
They have two phases. In the pale phase, they are above dark brown, with white forehead, lores and throat. Rest of underparts are white to pale rufous. In the dark phase, its underparts are dark brown, and its tail is gray-brown. This bird eats insects as grasshoppers, and small mammals.