. =Western evening grosbeak.= COCCOTHRAUSTES VESPERTINUS MONTANUS.
Resident; found every month of the year; no nests found, but evidently
breeds.

515a. =Rocky Mountain pine grosbeak.= PINICOLA ENUCLEATOR MONTANA.
Resident; not uncommon; most common in late summer and fall when most of
them are just below timber-line; stragglers descend to foothills and
plains.

517. =Purple finch.= CARPODACUS PURPUREUS. Migrant; rare, if not
accidental; only one specimen, and that a female.

518. =Cassin's purple finch.= CARPODACUS CASSINI. Common resident;
winters from plains to 7,000 feet; breeds from that altitude to 10,000
feet.

519. =House finch.= CARPODACUS MEXICANUS FRONTALIS. Abundant resident.

521a. =Mexican crossbill.= LOXIA CURVIROSTRA STRICKLANDI. Resident; not
uncommon; has been seen in summer at 11,000 feet; breeds in mountains,
perhaps in winter like its eastern antitype.

522. =White-winged crossbill.= LOXIA LEUCOPTERA. Rare winter visitor;
one record.

524. =Gray-crowned leucosticte.= LEUCOSTICTE TEPHROCOTIS. Rare winter
visitor; western species.

524a. =Hepburn's leucosticte.= LEUCOSTICTE TEPHROCOTIS LITTORALIS. Rare
winter visitor; summers in the North.

525. =Black leucosticte.= LEUCOSTICTE ATRATA. Rare winter visitor;
summer range unknown; winters in the Rockies.

526. =Brown-capped leucosticte.= LEUCOSTICTE AUSTRALIS. This little bird
and the white-tailed ptarmigan have the highest summer range of any
Colorado birds.

528. =Redpoll.= ACANTHIS LINARIA. Common winter resident; lives from
plains to 10,000 feet.

528b. =Greater redpoll.= ACANTHIS LINARIA ROSTRATA. Rare or accidental
winter visitor; one record.

529. =American goldfinch.= ASTRAGALINUS TRISTIS. Resident; quite common
in summer; sometimes reaches 10,000 feet.

529a. =Western goldfinch.= ASTRAGALINUS TRISTIS PALLIDUS. 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 ARIZONAE. Summer
resident; not common.

530b. =Mexican goldfinch.= ASTRAGALINUS PSALTRIA MEXICANUS. 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