**_Podiceps caspicus_ (Hablizl).--On March 31, 1952, Olmstead saw "many Eared Grebes" on a pond 10 mi. E Hacienda La Mariposa. This is the first record of the Eared Grebe in Coahuila.
[_Pelecanus erythrorhynchos_ Gmelin.--The White Pelican is uncommon, if not rare; Friedmann, Griscom, and Moore (1950:21) list it.]
_Anhinga anhinga_ (Linnaeus).--On March 31, 1952, Olmstead noted an Anhinga perched on a submerged fence post in a lake 10 mi. E Hacienda La Mariposa. This is the first record of the Anhinga in Coahuila.
**_Ardea herodias_ Linnaeus.--Two subspecies of the Great Blue Heron, _treganzai_ and _wardi_, have been recorded from Coahuila. Friedmann, Griscom, and Moore (1950:27) listed _A. h. treganzai_ from the State; presumably this subspecies occurs widely in low density. They (_loc. cit._) remarked also that a record of _A. h. wardi_ from Coahuila "cannot be allocated subspecifically."
Dickerman saw two Great Blue Herons in a marshy area at San Marcos (=20 mi. S Cuatro Ciénegas) on May 4, 1954. Van Tyne and Sutton (1937:12) noted the Great Blue Heron "near Boquillas [Texas], along the Río Grande, on May 10 and 15...."
**_Butorides virescens_ (Linnaeus).--Olmstead saw a Green Heron at Boquillas, 700 feet, on March 10, 1952. Findley reported seeing Green Herons 2 mi. W Jiménez, 850 feet, on June 19, 1952, and 2 mi. S and 3 mi. E San Juan de Sabinas on June 22, 1952.
**_Casmerodius albus egretta_ (Gmelin).--The Common Egret is an uncommon migrant in Coahuila. Friedmann, Griscom, and Moore (1950:30) recorded _C. a. egretta_ from the "extreme northern part" of Coahuila. Van Tyne and Sutton (1937:12) saw the Common Egret "along the Río Grande on the Graham ranch just west of Boquillas," Texas, on May 16, which might well be the locality to which Friedmann, Griscom, and Moore referred. Olmstead saw a Common Egret at Don Martín on March 22, 1952.
**_Nycticorax nycticorax hoactli_ (Gmelin).--This subspecies of the Black-crowned Night Heron was listed from the "extreme north" section of Coahuila by Friedmann, Griscom, and Moore (1950:32). Van Tyne and Sutton (1937:14) saw three Black-crowned Night Herons along the Río Grande about two miles west of Boquillas, Texas, on May 16. This record probably represents the locality to which Friedmann, Griscom, and Moore (_op. cit._) referred.