The roadside hawk is 31–41 cm long and weighs 250–300 g. Males are smaller than females, they are mainly brown or grey with light reddish-brown wings, especially when seen in flight. Several subspecies are recognize (about a dozen.) They feed on large insects and small vertebrates, usually seen on edges of forest and roads, they are found from Mexico to Argentina
R. m. griseocauda sub specie for CR. Picture, shows a juvenile.