Black-throated blue warbler
| Black-throated blue warbler | |
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| Male | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Family: | Parulidae |
| Genus: | Setophaga |
| Species: | S. caerulescens |
| Binomial name | |
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Setophaga caerulescens (Gmelin, 1789) |
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| Range of S. caerulescens Breeding range Wintering range | |
| Synonyms | |
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Dendroica caerulescens |
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Dendroica caerulescens
The black-throated blue warbler (Setophaga caerulescens) is a small passerine bird of the New World warbler family. Its breeding ranges are located in the interior of deciduous and mixed coniferous forests in eastern North America. Over the cooler months, it migrates to islands in the Caribbean and Central America. It is a very rarely found in western Europe, where it is considered to be a non-indigenous species. The black-throated blue warbler is sexually dimorphic; the adult male has a black face and cheeks, deep blue upperparts and white underparts, while the adult female is olive-brown above and light yellow below.
Predominantly insectivorous, the black-throated blue warbler supplements its diet with berries and seeds in winter. It builds its nests in thick shrubs and the closeness of its nesting sites to the ground make it a favored species for the study of warbler behavior in the wild. The black-throated blue warbler defends its territory against other birds of the same species for both nesting and winter habitats. As the black-throated blue warbler requires large, unbroken forest areas for nesting, its numbers are declining.
The German naturalist Johann Friedrich Gmelin described the black-throated blue warbler in 1789. Its species name is the Latin adjective caerulescens meaning "turning blue".
The black-throated blue warbler is one of the New World warblers or wood-warblers in the family Parulidae. This species was originally placed under the genus Dendroica. It was recently adjusted to be a member of genus Setophaga along with all other members of the genus Dendroica, based on the findings from a recent phylogenetic analysis of and nuclear DNA in 2010. The old genus Dendroica was then deleted. Within the genus, it appears to have no particularly close relatives.
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