*Accipiter cooperii (Bonaparte).—Miller (1955a:161) found Cooper's Hawk breeding in the Sierra del Carmen on April 26.
Buteo jamaicensis borealis (Gmelin).—The Red-tailed Hawk is common in Coahuila. Burleigh and Lowery (1942:188) noted the Red-tailed Hawk on the higher ridges above an elevation of 6000 feet in southeastern Coahuila. On April 17, Burleigh and Lowery (loc. cit.) saw two Red-tailed Hawks "in the open valley south of Diamante Pass" and on April 20, "just outside of Saltillo," these workers obtained an immature male that was referred to B. j. borealis.
**Buteo jamaicensis fuertesi Sutton and Van Tyne.—Miller (1955a:161) took a male Red-tailed Hawk, on April 14 at 7000 feet in the Sierra del Carmen, that was referred to as B. j. fuertesi. To my knowledge, there are no other records of this subspecies from Coahuila, but this must be the resident form over the bulk of western Coahuila.
There are several sight records of the Red-tailed Hawk. Olmstead saw one 16 mi. S Boquillas, 1600 feet, on March 6, 1952; Dickerman saw a Red-tailed Hawk 16 mi. E and 18 mi. N Ocampo on May 7, 1954, one 20 mi. S Ocampo on April 4, 1954; and an immature at Saltillo on January 17, 1954.
Buteo platypterus platypterus (Vieillot).—Specimen examined: one, ♂ 32628, from 13 mi. E San Antonio de las Alazanas, 9950 ft., July 6, 1955.
The Broad-winged Hawk is rare in Coahuila. No. 32628, if a migrant, was retarded from moving northward by the loss of its right foot and distal one-third of its tarsus. Packard (1957:371) reported this specimen as the first record of the species in Coahuila.
*Buteo swainsoni Bonaparte.—Specimens examined: total 2: ♂ 32022 from 2 mi. W Jiménez, 850 ft., June 20, 1952; and ♂ 29555 from Iglesias (=15 mi. SW Sabinas), 1000 ft., August 22, 1949.
Swainson's Hawk is not common in Coahuila. The size of the testes (6×4 mm.) of No. 32022, the adult plumage, and the date (June 20) on which it was obtained suggest that it was a breeding bird. Friedmann, Griscom, and Moore (1950:55) reported that this species breeds as far east as Durango and Chihuahua. Findley saw a Swainson's Hawk 2 mi. S and 3 mi. E San Juan de Sabinas on June 22, 1952.
**Buteo albonotatus Kaup.—The Zone-tailed Hawk is uncommon in Coahuila. Sutton and Burleigh (1939a:26) noted the species "a few miles west of Saltillo ... on January 30."
Buteo regalis (Gray).—The Ferruginous Hawk is uncommon in Coahuila. Sutton and Burleigh (1939a:26) noted a single bird "not far from Parras, on January 30."