554a. =Intermediate sparrow.= ZONOTRICHIA LEUCOPHRYS GAMBELII. Common migrant, both east and west of the range; breeds north of the United States. 557. =Golden-crowned sparrow.= ZONOTRICHIA CORONATA. Accidental winter visitor; Pacific Coast species; breeds in Alaska. 558. =White-throated sparrow.= ZONOTRICHIA ALBICOLLIS. Rare migrant; but three records. 559a. =Western tree sparrow.= SPIZELLA MONTICOLA OCHRACEA. Common winter resident; mostly on plains and in lower mountains. 560. =Chipping sparrow.= SPIZELLA SOCIALIS. Rare summer resident; common in migration; goes as far west as base of the mountains. 560a. =Western chipping sparrow.= SPIZELLA SOCIALIS ARIZONÆ. Abundant summer resident; breeds from base of foothills to 10,000 feet. 561. =Clay-colored sparrow.= SPIZELLA PALLIDA. Summer resident; not uncommon; scattered over State east of mountains. 562. =Brewer's sparrow.= SPIZELLA BREWERI. Summer resident; not uncommon; breeds from plains to 8,000 feet. 566. =White-winged junco.= JUNCO AIKENI. Common winter resident; on plains and 8,000 feet up in the mountains. 567. =Slate-colored junco.= JUNCO HYEMALIS. Winter resident; not common; not found above 8,000 feet. 567b. =Shufeldt's junco.= JUNCO HYEMALIS CONNECTENS. Abundant winter resident; most common in southern part of the State; not uncommon elsewhere. 567.1. =Montana junco.= JUNCO MONTANUS. Winter visitor; not uncommon. 568. =Pink-sided junco.= JUNCO MEARNSI. Common winter resident; plentiful at base of foothills in winter; in spring ascend to 10,000 feet; then leaves the State for the North. 568.1. =Ridgway's junco.= JUNCO ANNECTENS. Rare winter visitor; one record. 569. =Gray-headed junco.= JUNCO CANICEPS. Abundant resident; breeds from 7,500 to 12,000 feet; sometimes rears three broods. 570a. =Red-backed junco.= JUNCO PHÆONOTUS DORSALIS. Rare migrant; abundant just south of State. 573a. =Desert sparrow.= AMPHISPIZA BILINEATA DESERTICOLA. Summer resident; not uncommon locally; found only in southwestern part of the State. 574a. =Sage sparrow.= AMPHISPIZA BELLI NEVADENSIS. Abundant summer resident; common on sage-brush plains of western and southwestern Colorado; ranges as far east as San Luis Park and north to Cheyenne, Wyoming. 581. =Song-sparrow.= MELOSPIZA FASCIATA. Rare migrant; found only at eastern border of State. 581b. =Mountain song-sparrow.= MELOSPIZA FASCIATA MONTANA. Common summer resident; a few remain on plains in mild winters; breeds from plains to 8,000 feet. 583. =Lincoln's sparrow.= MELOSPIZA LINCOLNI. Common summer resident; abundant in migration; breeds from base of foothills to timber-line. 584. =Swamp sparrow.= MELOSPIZA GEORGIANA. Accidental summer visitor; one record. 585c. =Slate-colored sparrow.= PASSERELLA ILIACA SCHISTACEA. Rare summer resident; only three records.