THE BIRDS OF BOULDER COUNTY 237 



554a, Zonotrichia leucophrys gambelli — Intermediate Sparrow. 



Common migrant. Have taken it only in migration along the base of the foothills. 

 559a. Spizella monticola ochracea — Western Tree Sparrow. 



Common winter resident of plains and lower mountains. 

 560a. Spizella passerina arizonae — Western Chipping Sparrow. 



Common summer resident from plains to 10,000 feet, at which latter altitude Gale 

 twice took its eggs. Have no certain record of 5. passerina for the county. 

 562. Spizella breweri — Brewer Sparrow. 



Have seen but one taken at Boulder, in summer. At Silver Lake, 10,000 feet, have 

 seen several and taken two in September. 



566. Junco aikeni — White-winged Junco. 



Common winter resident of plains and lower mountains. One specimen in University 

 cabinets is considered hybrid, /. aiheni X /. mearnsi. 



567. Junco hyemalis — Slate-colored Junco. 



One winter specimen taken near Boulder in University cabinets. 

 567ft. Junco hyemalis shufeldti — Shufeldt Junco. 



Abundant winter resident. 

 567^. Junco hyemalis mearnsi — Pink-sided Junco. 



Common winter resident of mountains and western edge of plains. 

 567.1. Junco hyemalis montanus — Montana Junco. 



One winter specimen from near Boulder in University cabinets. Felger has two taken 

 by Gale, but without data. 

 [568.1. Junco annectens, Junco ridgwayi — Ridgway Junco. 



Boulder, November 25, 1892 (McGregor). Pronounced hybrid by Ridgway (Birds 

 of North and Middle America, Part I, pp. 276-277), /. caniceps X /. mearnsi. Gale 

 also mentions this supposed species.] 

 5706. Junco phaeonotus caniceps — Gray-headed Junco. 



Abundant winter resident of plains and foothills, breeding commonly in lower moun- 

 tains and abundantly near timberline. One was taken by Bragg in summer on the mesa 

 south of Boulder. Gale noted them in pairs at 10,000 feet near Ward on March 23, 

 1887. His nests were all taken at from 9,500 to 10,000 feet, from June n to July 5. 

 574.1. Amphispiza nevadensis— Sage Sparrow. 



One taken at Left Hand by Dille, March 18, 1904. 

 5816. Melospiza melodia montana — Mountain Song Sparrow. 



Summer resident of mountains, not uncommon. At Boulder have seen it only in 

 migration season. Gale noted it as winter resident of plains. 

 583. Melospiza lincolnii — Lincoln Sparrow. 



Common in migration on plains and mountains. Common summer resident of 

 mountains. The 19 sets of eggs in the Gale collection were all taken at about 10,000 feet, on 

 the ground in tufts of grass, etc. 

 588. Pipilo maculatus arcticus — Arctic Towhee. 



Seen along the foothills occasionally in winter or early spring. Have seen but one in 

 Boulder, on April 21, 1907, during a snowstorm. 



