36 NORTH AMERICAN HERONS AND THEIR ALLIES. 



Ward Heron. Ardea herodias wardi Ridgway. 



The form of the great blue heron breeding in Florida has received 

 the name of wardi. It includes not only all the Florida breeding 

 birds, but also those breeding on the Atlantic coast north to Hilton- 

 head, Beaufort County, S. C. (Prentiss) ; along the Gulf coast to 

 Corpus Christi, Tex. (Sennett) ; and up the middle of the Missis- 

 sippi Valley to Knox County in southwestern Indiana (Ridgway) ; 

 and Henry County in southeastern Iowa (Savage). 



This form is resident throughout its range with the exception of 

 those individuals that migrate up the Mississippi Valley. These 

 retire in the fall to spend the winter on the Gulf coast. A specimen 

 taken December 25, 1902, at Ocotlan, Jalisco (Nelson and Goldman), 

 apparently represents a bird that had wandered far from its normal 

 range. 



Treganza Heron. Ardea Jierodift-s tregansai Court. 



The large, dark, great blue herons of the Mississippi Valley are 

 cut off from those of the Pacific by a small pale form occupying the 

 Great Basin and the semiarid regions to the eastward. This form 

 has been separated under the name of treganzai, and birds of this 

 character breed north at least to Douglas, Wyo. (Dwight) ; Gallatin. 

 Mont. (Richmond) ; and Grace, southeastern Idaho (Walcott) ; and 

 south to the Salton Sea, Cal. (Grinnell). 



During migration it spreads westward into California to the Sac- 

 ramento Valley (Williamson) . 



It ranges south in winter to the lower Rio Grande Valley of Texas 

 (Dwight) ; and in northern Mexico south to Colima (Nelson and 

 Goldman) ; while it remains in winter north to Fort Clark, Tex. 

 (Mearns) ; Dona Ana, N. Mex. (Henry) ; and St. George, Utah 

 (Bailey). 



Northwestern Coast Heron. Ardca Jiprndias fnnnim Chapman. 



As its name implies, the northwestern coast heron is confined to the 

 Pacific coast. It is known to breed north to Glacier Bay, Alaska 

 (Grinnell), and it probably breeds still farther north, for it was seen 

 occasionally during the summer of 1906 near Yakutat Bay (Black- 

 welder) ; and at Hope, Cook Inlet, during August, 1900 (Heller). 

 This form breeds south to Cape Flattery, Wash. (Trowbridge) ; and 

 to Nisqually Flats near Tacoma, Wash. (Rhoads). 



Alaska is deserted in winter, and most of the individuals spend this 

 season in the vicinity of Puget Sound north to Chilliwack, B. C. 

 (Brooks). 



