Subspecies in Kansas: B. j. borealis (Gmelin) is the breeding bird of eastern Kansas. B. j. calurus Cassin probably nests in west but no specimens available. B. j. borealis, B. j. calurus, B. j. kriderii Hoopes, and B. j. harlani (Audubon), the latter considered here as conspecific with jamaicensis, all occur as transients and winter residents. More specimens needed to establish details of distribution of various subspecies.
* Buteo lineatus. Red-shouldered Hawk. Uncommon transient and summer resident and irregular winter resident in eastern Kansas. Breeding records from Leavenworth and Woodson counties; doubtless breeds in other eastern counties but definite evidence lacking.
Subspecies in Kansas: B. l. lineatus (Gmelin).
* Buteo platypterus. Broad-winged Hawk. Fairly common transient and local summer resident in eastern Kansas. Breeding records only from Douglas, Leavenworth, and Johnson counties, where species nests regularly.
Subspecies in Kansas: B. p. platypterus (Vieillot).
* Buteo swainsoni Bonaparte. Swainson Hawk. Abundant transient in west, fairly common in east. Nests commonly throughout western two-thirds of state and at least occasionally in eastern portion. Supposed winter records should be substantiated by specimens.
No subspecies recognized.
Buteo lagopus. Rough-legged Hawk. Winter resident, fairly common in east to common in west.
Subspecies in Kansas: B. l. s. johannis (Gmelin).
* Buteo regalis (Gray). Ferruginous Rough-leg. Common transient and winter resident in west, rare in east. Rare summer resident in west. Two nesting records: nest with four young, south fork of Smoky Hill River, near Wallace, May 27, 1883, Goss; nest with three young, west of Russell Springs, Logan County, May 29, 1954, Marvin D. Schwilling.