I04 BIRDS OF COLORADO. 



561. Spizella pallida. Clay-colored Sparrow. 



Summer resident ; not uncommon. Appears not to be 

 common anywhere in Colorado, but is scattered over all of the 

 State east of the mountains. Breeds in north-central Colorado 

 on the plains and at the base of the foothills, but the southern 

 limit of its breeding range in the State has not been satisfact- 

 orily determined. V. L. Kellogg shot one in Estes Park August 

 10. (Trans. Kans. Acad. Science, XII. 1889-90, 86). This is 

 the only record for the mountains and is probably a bird that 

 had wandered upward after the breeding season. Arrives the 

 last of April and leaves late in September. 



56a. Spizella breweri. Brewer's Sparrow. 



Summer resident; not uncommon. Arrives from the mid- 

 dle of April to the first of May. Most common in migration 

 the first half of May. Rather more common in the southern 

 half of the State. Breeds throughout its range from the plains 

 to 8,000 feet. Principally a western species, but Capt. P. M. 

 Thome took it as far east as Fort Ivyon. 



566. Juncoaikeni. White-winged Junco. 



Winter resident ; common. Winters on the plains and in 

 the mountains to at least 8,000 feet. The commonest Snowbird 

 in the mountains in the winter. According to C E. Aiken, "the 

 first stragglers from the north do not make their appearance till 

 about the 5th of October, [this is on the plains of El Paso 

 County. In the mountains they do not arrive until late in 

 October or early November,] and then in gradually increasing 

 numbers till the first of December, when they come in large 

 flocks, the last to arrive being the old and fully plumaged males. 

 While many of the females and young birds proceed farther to 

 the south, the greater number of the adult males winter at 

 some point farther to the north than El Paso County, as of the 

 whole number seen during the winter only about two-fifths are 

 males. Early in February the old birds begin to start northward, 

 the general migration being delayed about a month." Has 

 been taken in Colorado as late as April 11. Breeds in northern 

 Wyoming. 



567. Junco hyemalis. Slate-colored Junco. 



Winter resident; not common. The typical hyemalis 

 comes west to the Rocky Mountains as a rather rare visitor. 

 If it is ever common, it is during spring migration from the 

 last of March to the middle of April; less common during fall 

 migration in November; still less common during the winter 

 season. Winters on the plains and in the foothills to 7,000 

 feet. During spring migration goes a 1,000 feet higher. Not 



