CHECK-LIST OF COLORADO BIRDS 333 



528. Redpoll. ACANTHIS LINARIA. Common winter resi- 

 dent ; lives from plains to 10/)00 feet. 



528b. Greater redpoll. ACANTHIS LINARIA ROSTRATA. 

 Rare or accidental winter visitor; one record. 



529. American goldfinch. ASTRAGALINUS TRISTIS. Resi- 

 dent ; quite common in summer ; sometimes reaches 

 10,000 feet. 



529a. Western goldfinch. ASTRAGALINUS TRISTIS PAL- 

 LIDUS. Migrant ; probably common ; added by Mr. Aiken. 



530. Arkansas goldfinch. ASTRAGALINUS PSALTRIA. 

 Common summer resident ; breeds from plains to over 

 9,000 feet. 



530a. Arizona goldfinch. ASTRAGALINUS PSALTRIA ARI- 

 ZONA. Summer resident ; not common. 



530b. Mexican goldfinch. ASTRAGALINUS PSALTRIA MEXI- 

 CANUS. Rare, but believed to be a summer resident at 

 Trinidad. 



533. Pine siskin. SPINUS PINUS. Common resident ; 

 breeding range from plains to timber-line. 



000. English sparrow. PASSER DOMESTICUS. Rapidly 

 increasing in numbers ; has settled at points west of the 

 range. 



534. Snowflake. PASSERINA NIVALIS. Rare winter vis- 

 itor ; one record west of the range ; several east. 



536a. Alaskan longspur. CALCARIUS LAPPONICUS ALAS- 

 CENSIS. Common winter resident ; breeds far north. 



538. Chestnut-collared longspur. CALCARIUS ORNATUS. 

 Rare summer resident ; winter resident,, not common ; 

 common in migration. 



539. McCown's longspur. RHYNCOPHANES MCCOWNII. 

 Common winter resident, dwelling on the plains. 



