629b. Plumbeous vireo. Vireo solitarius plumbeus. Summer resident; common; breeds in foothills and mountains up to over 9,000 feet.
636. Black and white warbler. Mniotilta varia. Rare summer visitor; two records.
644. Virginia's warbler. Helminthophila virginiæ. Common summer resident; western bird, but breeds along eastern base of foothills.
646. Orange-crowned warbler. Helminthophila celata. Summer resident; not uncommon; common migrant; breeds from 6,000 to 9,000 feet.
646a. Lutescent warbler. Helminthophila celata lutescens. Summer resident; not uncommon: western form of the orange-crowned warbler; ranges to eastern base of mountains.
647. Tennessee warbler. Helminthophila peregrina. Rare migrant; eastern Colorado to base of mountains.
648. Parula warbler. Compsothlypis americana. Rare summer resident; comes to base of foothills.
652. Yellow warbler. Dendroica æstiva. Abundant summer resident; breeds up to 8,000 feet.
652a. Sonora yellow warbler. Dendroica æstiva sonorana. Summer resident; probably common; to the southwest æstiva shades into sonorana.
654. Black-throated blue warbler. Dendroica cærulescens. Rare migrant; one record.