336 BIRDS OF THE ROCKIES 



COLA. Summer resident ; not uncommon locally ; found 

 only in southwestern part of the State. 



ST^a. 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 fascl\ta. Rare mi- 

 grant ; 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. Com- 

 mon summer resident ; abundant in migration ; breeds 

 from base of foothills to timber-line. 



584.. Swamp sparrow. Melospiza georgiana. Acci- 

 dental summer visitor ; one record. 



585c. Slate-colored sparrow. Passerella iliaca schis- 

 TACEA. Rare summer resident ; only three records. 



588. Arctic towhee. Pipilo maculatus arcticus. Win- 

 ter resident ; not uncommon ; comes to base of Rocky 

 Mountains in winter ; breeds in the North, as far as the 

 Saskatchewan River. 



588a. Spurred towhee. Pipilo maculatus megalonvx. 

 Common summer resident ; upper limit, 9jOOO feet. 



591. Caiion tow^hee. Pipilo fuscus mesoleucus. Resi- 

 dent ; common locally ; all records from Arkansas Valley ; 

 rare at an altitude of 10,000 feet. 



592. Abert's towhee. Pipilo aberti. Rare summer 

 resident ; species abundant in New Mexico and Arizona. 



592.1. Green-tailed tow^hee. Oreospiza chlorura. 

 Common summer resident ; melodious songster. 



