Large raptor with broad wings and short tail. Fairly common and widespread in South America, from high elevations in the Andes of Colombia to the lowlands in Tierra del Fuego. Adults have a dark gray head and breast contrasting with a white belly. Wings are silvery-gray from above; from below, the coverts are white contrasting with dark flight feathers. Note the shape in flight with bulging secondaries, tapered wingtips, and a very short tail. Young birds are brown and streaky, tricky to distinguish from Variable Hawk. Look for bulkier shape and shorter, more graduated tail.