661. =Black-poll warbler.= DENDROICA STRIATA. Rare summer resident; sometimes common in migration; one breeding record for the State--at Seven Lakes; altitude, 11,000 feet.
664. =Grace's warbler.= DENDROICA GRACIÆ. Summer resident; common in extreme southwestern part of the State.
665. =Black-throated gray warbler.= DENDROICA NIGRESCENS. Summer resident; not infrequent; breeds in pinon hills near Cañon City.
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.