Miller (1955a:171) found this subspecies of Hermit Thrush wintering with H. g. guttata in the Sierra del Carmen. Hellmayr (1934:456) listed H. g. auduboni from Sabinas.
**Sialia sialis fulva Brewster.—Hellmayr (1934:479) listed this subspecies of the Eastern Bluebird from Sabinas.
*Sialia mexicana mexicana Swainson.—Miller, Friedmann, Griscom, and Moore (1957:199) remarked that the subspecies mexicana of the Western Bluebird breeds in the southern mountains of Coahuila where, at El Diamante, on July 7, a specimen (or specimens ?) in breeding condition was obtained. Burleigh and Lowery (1942:200) found S. m. mexicana "well distributed in the open woods about" Diamante Pass, but at no time below an elevation of approximately 6500 feet. Sutton and Burleigh (1939a:38) also saw "several brown-backed" Western Bluebirds at Diamante Pass on March 6. Ridgway (1907:150) recorded S. m. mexicana from Saltillo, Carneros, and Sierra Guadalupe.
Sialia currucoides (Bechstein).—Specimen examined: one, ♀ 31078, from Sierra de la Encantada (=38 mi. S, 23 mi. E Boquillas), 4400 ft., March 14, 1952, weight, 23.7 gms.
The Mountain Bluebird is a winter visitant to Coahuila. Miller, Friedmann, Griscom, and Moore (1957:200) recorded Sialia currucoides from Hipólito on February 24.
**Myadestes townsendi townsendi (Audubon).—Specimen examined: one, ♀ 31079, from 26 mi. W Santa Teresa, 7050 ft., April 4, 1952.
Miller (1955a:171) detected Townsend's Solitaire in clumps of large pines in two different locations at 7000 and 7500 feet on April 4, 6, and 8 in the Sierra del Carmen. He did not find a breeding population of M. t. townsendi, but did note favorable habitat for breeding. Ridgway (1907:164) recorded M. townsendi from the Sierra Guadalupe on April 21. Dickerman saw a Townsend's Solitaire in the Sierra de la Madera on December 13, 1953.
The underparts of No. 31079 are not uniformly dark, being paler on the chin, throat, and abdomen than elsewhere as is true of typical representatives of M. t. townsendi.
**Polioptila caerulea caerulea (Linnaeus).—Specimen examined: one, ♂ 32097, from 2 mi. S, 11 mi. E Nava, June 15, 1952.
No. 32097 is the first record of occurrence of this subspecies of Blue-gray Gnatcatcher in the State. The white of the underparts of No. 32097 is less grayish than the underparts of typical representatives of P. c. amoenissima, and the black at the base of the inner webs of the outermost rectrix does not extend beyond the tip of the under tail coverts. Representatives of P. c. amoenissima have black at the base of the inner web of the outermost rectrix more extended, usually showing beyond the tip of the under tail coverts. The size of the testes (3×2 mm.) of No. 32097 does not suggest breeding, but the date (June 15) indicates that it was a resident.