Swainson's Hawks or Locust Hawks breed in the prairie and dry grassland areas in western North America, and migrate south to Argentina for the winter.
Adults have pale bodies with dark "bibs" on the chests and white throat patches.
Two color phases occur in the wild:
Light morph birds are whitish below (except for a reddish chest) and on the underwings. The tail is grey with dark bars. Their head is brown with a white patch on the chin.
Dark morph birds have an entirely dark brown plumage except for a light patch under the tail.
A rufous variant has also been identified, which is lighter below with reddish bars.