Other Scientific Names
Helmitheros vermivorus [BirdLife International (2004)], Helmitheros vermivorus [Sibley and Monroe (1990, 1993)], Helmitheros vermivorus [Stotz et al. (1996)]
Bahamas, Belize, Canada, Cayman Islands, Colombia, Costa Rica, Cuba, Dominican Republic, El Salvador, Guatemala, Haiti, Honduras, Jamaica (NB), Mexico, Nicaragua, Panama, Puerto Rico, Turks and Caicos Islands, USA (B), Venezuela, Virgin Islands (British) (NB), Virgin Islands (U.S.) (NB).
Vagrant to Antigua And Barbuda, Guadeloupe, St Pierre and Miquelon (P).
Breeds over much of eastern USA south of Great Lakes (excluding Florida Peninsula and much of southern Atlantic coastal plain); distribution centred around Appalachians and adjacent areas. Migrates to lowlands of Middle America from southern and eastern Mexico south to western Panama, and Caribbean.
 
Population
Estimated population is 800,000 (2010).
Worm-eating Warbler (Helmitheros vermivorum) [XC235684]
by Jerald R from Holly Springs, Marshall County, Mississippi, United States (song)
Worm-eating Warbler (Helmitheros vermivorum) [XC313282]
by Brian Henderson from Holly Springs, Marshall County, Mississippi, United States (song)
Subspecies
No subspecies.
Genus sometimes merged with Lymnothlypis but, despite superficial similarities, the two are apparently not closely related. Has been suggested that genus may be closest to Vermivora.