486. =American raven.= CORVUS CORAX SINUATUS. Resident; common locally; breeds; rather of western Colorado, but visitant among eastern mountains. 487. =White-necked raven.= CORVUS CRYPTOLEUCUS. Rare resident now; formerly abundant along eastern base of the front range and a hundred miles out on the plains; now driven out by advent of white man. 488. =American crow.= CORVUS AMERICANUS. Resident; common in northeastern Colorado; rare in the rest of the State. 491. =Clark's nutcracker.= NUCIFRAGA COLUMBIANA. Abundant resident; a mountain bird; breeds from 7,000 to 12,000 feet; sometimes in fall gathers in "enormous flocks"; at that season wanders up to at least 13,000 feet; most remain in the mountains through the winter, though a few descend to the plains. 492. =Pinon jay.= CYANOCEPHALUS CYANOCEPHALUS. Resident; abundant locally; breeds almost exclusively among the pinon pines; keeps in small parties during breeding season; then gathers in large flocks; wandering up to 10,000 feet. 494. =Bobolink.= DOLICHONYX ORYZIVORUS. Rare summer visitor. 495. =Cowbird.= MOLOTHRUS ATER. Common summer resident; breeds from plains to about 8,000 feet; author saw several in South Park. 497. =Yellow-headed blackbird.= XANTHOCEPHALUS XANTHOCEPHALUS. Common summer resident; breeds in suitable places on the plains and in mountain parks. 498. =Red-winged blackbird.= AGELAIUS PHOENICEUS. Common summer resident; breeds mostly below 7,500 feet, though occasionally ascends to 9,000. 501b. =Western meadow-lark.= STURNELLA MAGNA NEGLECTA. Abundant summer resident. 506. =Orchard oriole.= ICTERUS SPURIUS. Summer visitor; rare, if not accidental. 507. =Baltimore oriole.= ICTERUS GALBULA. Marked as a rare summer resident, though no record of nesting. 508. =Bullock's oriole.= ICTERUS BULLOCKI. Abundant summer resident; breeds on plains and in mountain regions below 10,000 feet. 509. =Rusty blackbird.= SCOLECOPHAGUS CAROLINUS. Migrant; rare, if not accidental; two records. 510. =Brewer's blackbird.= SCOLECOPHAGUS CYANOCEPHALUS. Abundant summer resident. 511b. =Bronzed grackle.= QUISCALUS QUISCULA ÆNEUS. Summer resident; not uncommon locally; comes only to eastern base of mountains. 514a. =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.