The Common Yellowthroat (Geothlypis trichas) is a New World warbler. It is an abundant breeder in North America, ranging from southern Canada to central Mexico. The genus name Geothlypis is from Ancient Greek geo, "ground", and thlupis, an unidentified small bird; thlypis is often used in the scientific names of New World warblers. The specific trichas is also from Greek; trikhas is a kind of thrush, the word being derived from trikhos, "hair".
Common yellowthroats are small songbirds that have olive backs, wings and tails, yellow throats and chests, and white bellies. Adult males have black face masks which stretch from the sides of the neck across the eyes and forehead, which are bordered above with white or gray. Females are similar in appearance, but have paler underparts and lack the black mask.
The breeding habitats of these birds are marshes and other wet areas with dense low vegetation, and may also be found in other areas with dense shrub. However, these birds are less common in dry areas.
The common yellowthroat's song is a loud twichety twichety twichety twich. Its call is a soft jip.