GRAY-HEADED JUNCO 1125 



about 25 j uncos, all caniceps and dorsalis, suddenly disappeared after 

 a one-inch snowfall November 2, except two caniceps and one dorsalis, 

 "even though the feeding station was well baited; very siu-prising," 

 and that most did not retui-n for nearly a month. 



While gray-headed juncos accompany the other j uncos in the winter, 

 both races often are partly segregated within the flocks from the 

 Oregon and slate-colored juncos. In early November in the Arizona 

 White Mountains, A. R. Philhps (MS.) noted that a group "which 

 detached itseK from the main group and fed off to one side of the field 

 among small yellow pines was composed of several dorsalis and a few 

 canicejys." Philhps continues: "These two races often segregate 

 within larger flocks, as do the oreganus group; thus a flock will contain 

 several races, but often a part of the flock feeding in one spot will be 

 entu-ely composed of northern or southern races." Later in No- 

 vember, he recorded that dorsalis outnumbered caniceps by two or 

 three to one, and that the dorsalis "also seemed more active than any 

 other race and were always chasing each other about." In Febru- 

 ary and March, on several occasions dorsalis was noted with other 

 juncos, but almost always feeding aside from the main flock and 

 staying closer to thick brush; on one occasion in late March they 

 were, however, recorded as "not in brush this time, but feeding with 

 others by the road." In the same area, E. C. Jacot (MS.) agrees that 

 caniceps is "evidently rarer away from timber than oreganus group." 



Distribution 

 Northern Gray-headed Junco {J. c. caniceps) 



Range. — Southern Idaho and southern Wyoming south to northern 

 portions of Sonora, Sinaloa and Diu-ango, and western Texas. 



Breeding range. — The northern gray-headed junco breeds in moun- 

 tains from southern Idaho, Nevada (Santa Rosa and Jarbidge 

 mountains), Utah (Porcupine Ridge, Uinta Mountains), and south- 

 ern Wyoming (Uinta Moimtains, Medicine Bow Range) south through 

 central and east central Nevada (Toiyabe Mountains, Wilson Peak) , 

 the White Mountains of California, Utah, and western and central 

 Colorado to northern Arizona (intergrades with J. c. dorsalis on Kaibab 

 Plateau) and northern New Mexico (Chuska Mountains; Pecos; 

 intergrades with J. c. dorsalis in Zuni Mountains). 



Winter range.— Wmiers in lower mountains and plains of breeding 

 area, north to northern Utah (Utah Lake VaUey), northern Colorado 

 (Rocky Mountain National Park); and from western Nebraska 

 (Scotts Bluff County) and eastern Colorado (Fort Morgan, Yunui) 

 south to northern Sonora (Rancho Carrizal), northern Sinaloa 

 (Babizos), northern Durango (Cienaga de las Vacas), and western 



