The salt marsh common yellowthroat, Geothlypis trichas sinuosa, is a subspecies of the common yellowthroat, a New World warbler. It was first described by Joseph Grinnell in 1901, who distinguished it from neighboring western subspecies by darker dorsal coloration and slightly smaller size. Because of its discovery in San Francisco Bay, the subspecies is often referred to as the San Francisco common yellowthroat.

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