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.