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ViewsBlack-throated Green WarblerFrom Opus
Dendroica virens
[edit] IdentificationLength 4.5-5 inches.
Female:
Fall:
Sexually dimorphic. [edit] Similar SpeciesIn the west, the two most likely confusing species are Townsend’s and Hermit Warblers. Hermit usually has plainer face, greyer back and lacks streaking on the sides. Townsend’s has a more contrasting face, often streaking on the back and usually a much more yellow upper breast. Either a very dull immature Townsend’s or a Hermit X Townsend’s hybrid are likely to cause the most confusion. In these and all cases the wash of yellow across the vent just behind the legs is diagnostic for Black-throated Green. [edit] DistributionPhoto by Stanley Jones Quetzal Valley, San Gerardo de Dota, San José Province, Cordillera de Talamancas, Costa Rica, March 2007 Breeds from Saskatchewan east to eastern Quebec and Newfoundland; northern Minnesota and Michigan east to Pennsylvania; also along the Appalachians south to northern Alabama. Waynei subspecies found along the Atlantic coastal plain. Winters east Mexico to central Panama. Also winters in the southern tip of Florida. Rare but regular vagrant in the western United States. Accidental vagrant to Greenland (3 records) and Germany (1 19th century record). [edit] TaxonomyThis is a monotypic species[1]. Subspecies waynei is generally considered invalid[2]. [edit] HabitatBreeds in open coniferous and mixed forests; also in cypress swamps in the coastal Carolinas. Observed at heights around 2,195 m. In migration found nearly anywhere with trees. [edit] Behaviour[edit] FlightOccasionally hovers whilst feeding. [edit] BreedingThe nest is an open cup and usually placed in the fork of a tree. The clutch consists of three to five eggs. [edit] DietDiet is mainly insectivorous. [edit] VocalisationSong: A buzzy zoo-zee-zoo-zoo-zee and other variations [edit] Reference
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