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,
[Male] 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: [Male]
32022 from 2 mi. W Jimenez, 850 ft., June 20, 1952; and [Male] 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 (6x4
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."

_Buteo nitidus_ (Latham).--Evenden (1952:112) saw a Gray Hawk one mile
northeast of Saltillo, at Ramos Arizpe on March 4. Although there are
no other records of the Gray Hawk from Coahuila, its occurrence in the
State would be expected because this species has been recorded from
Nuevo Leon and Tamaulipas in northeastern Mexico (Friedmann, Griscom,
and Moore, 1950:57).

**_Parabuteo unicinctus harrisi_ (Audubon).--Harris' Hawk is fairly
common in southern Coahuila. Sutton and Burleigh (1939a:26) stated that
Harris' Hawk "was one of the few birds noted repeatedly in ... southern
Coahuila...."

_Circus cyaneus_ (Linnaeus).--The Marsh Hawk is a common migrant and
winter visitant in Coahuila. Miller (1955a:161) remarked that the Marsh
Hawk was "seen in northward migratory flight across the desert east of
the Sierra del Carmen on March 31 and on April 11 along the west face
of Loomis Peak at 8800 feet."