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 phœniceus. 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.