This species is considered partially migratory, only withdrawing completely from breeding areas in Canada and the northern Great Plains during winter. Cooper's Hawks spend the winter as far south as Central America (although the bulk of the population probably stays north of the U.S.-Mexico border), with some traveling as far south as Colombia. Cooper's Hawks are common at all U.S. hawkwatch sites, but generally not as numerous as Sharp-shinned Hawks. The migration of this species usually overlaps with that of the Sharp-shinned Hawk, peaking in the first week of October, but there's a tendency for Cooper's Hawks to begin migration slightly later. Like Sharp-shinned Hawks, juvenile and adult Cooper's Hawks usually pass through in distinct waves.