668. =Townsend's warbler.= DENDROICA TOWNSENDI. Summer resident; not uncommon; western species, coming east to base of foothills and a few miles out on plains; breeds from 5,500 to 8,000 feet in western Colorado; in fall it is found as high as 10,000 feet. 672. =Palm warbler.= DENDROICA PALMARUM. Rare or accidental migrant; one specimen seen. 674. =Oven-bird.= SEIURUS AUROCAPILLUS. Rare breeder, on Mr. Aiken's authority. 675a. =Grinnell's water thrush.= SEIURUS NOVEBORACENSIS NOTABILIS. Rare migrant; appearing from plains to 8,000 feet. 678. =Connecticut warbler.= GEOTHLYPIS AGILIS. Rare or accidental migrant; one record by Mr. Aiken. 680. =Macgillivray's warbler.= GEOTHLYPIS TOLMIEI. Common summer resident; breeds from base of foothills to 9,000 feet. 681. =Maryland yellow-throat.= GEOTHLYPIS TRICHAS. One taken at Colorado Springs by Mr. Aiken. 681a. =Western yellow-throat.= GEOTHLYPIS TRICHAS OCCIDENTALIS. Common summer resident, almost restricted to the plains; both sides of the range. 683. =Yellow-breasted chat.= ICTERIA VIRENS. Accidental summer visitor. 683a. =Long-tailed chat.= ICTERIA VIRENS LONGICAUDA. Common summer resident; scarcely found in the mountains, but frequent in the lower foothills and on the plains; never seen above 8,000 feet. 685. =Wilson's warbler.= WILSONIA PUSILLA. Abundant summer resident; centre of abundance in breeding season, 11,000 feet; known to breed at 12,000 feet; also as low as 6,000. 685a. =Pileolated warbler.= WILSONIA PUSILLA PILEOLATA. Summer resident; not uncommon; Mr. Aiken thinks it as plentiful as preceding. 686. =Canadian warbler.= WILSONIA CANADENSIS. Rare or accidental migrant; one record by Mr. Aiken. 687. =American redstart.= SETOPHAGA RUTICILLA. Summer resident; not uncommon in eastern, rare in western, Colorado; breeds below 8,000 feet. 697. =American pipit.= ANTHUS PENSILVANICUS. Common summer resident; breeds only on summits of the mountains. 701. =American dipper.= CINCLUS MEXICANUS. Resident; common in favorite localities; one seen above timber-line in October. 702. =Sage thrasher.= OROSCOPTES MONTANUS. Summer resident; breeds from plains to nearly 10,000 feet; western species, coming east to mountain slopes. 703. =Mocking-bird.= MIMUS POLYGLOTTOS. Summer resident; common locally; mostly on plains, but sometimes reaches 8,000 feet. 704. =Catbird.= GALEOSCOPTES CAROLINENSIS. Common summer resident; from plains to 8,000 feet. 705. =Brown thrasher.= HARPORHYNCHUS RUFUS. Not uncommon as summer resident; almost restricted to the plains. 708. =Bendire's thrasher.= HARPORHYNCHUS BENDIREI. Summer resident; rare and local; south central part of State. 715. =Rock wren.= SALPINCTES OBSOLETUS. Common summer resident; breeds from plains to 12,000 feet. 717a. =Cañon wren.= CATHERPES MEXICANUS CONSPERSUS. Rare resident; one nest recorded. 719b. =Baird's wren.= THRYOMANES BEWICKII LEUCOGASTER. Rare summer resident.