Townsend's warbler | |
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Scientific classification ![]() | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Passeriformes |
Family: | Parulidae |
Genus: | Setophaga |
Species: | S. townsendi |
Binomial name | |
Setophaga townsendi (Townsend, 1837) | |
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Range of S. townsendi Breeding range Year-round range Wintering range | |
Synonyms | |
Sylvia townsendi (protonym) |
Townsend's warbler (Setophaga townsendi) is a small songbird of the New World warbler family.
Townsend's warbler was formally described in 1837 by the American naturalist John Kirk Townsend under the binomial name Sylvia townsendi. [2] The type locality is Fort Vancouver on the Columbia River in the state of Washington. [3] After the merger of the genera Dendroica and Setophaga, [4] Townsend's warbler is now placed in the genus Setophaga that was introduced by the English naturalist William Swainson in 1827. [5] [6] The species is monotypic: no subspecies are recognised. [6]
Townsend's warbler has a yellow face with a black stripe across its cheeks extending into an ear patch, a thin pointed bill, two white wing bars, olive upperparts with black streaks on their backs and flanks, and a white belly. [7] Adult males have a black cap, black throat and yellow lower breast; females have a dark cap and a yellow throat. Immature birds are similar to females with a dark green cap and cheeks. [8]
Standard Measurements [9] [8] | |
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length | 4.5–5 in (110–130 mm) |
weight | 8.8 g (0.31 oz) |
wingspan | 8 in (200 mm) |
wing | 63.1–69.9 mm (2.48–2.75 in) |
tail | 47.1–54 mm (1.85–2.13 in) |
culmen | 9.9–10.8 mm (0.39–0.43 in) |
tarsus | 18.1–19 mm (0.71–0.75 in) |
Their breeding habitats are coniferous forests with large trees on the northwestern coast of North America. [7] Their nests are shallow cups built with grass and lined with moss. [10] These nests are usually placed atop a branch in a conifer. The female lays 4 to 5 brown-speckled white eggs. [10]
This bird is closely related to the hermit warbler, and the two species interbreed where their ranges overlap. [8]
Birds from Haida Gwaii migrate short distances further south on the Pacific coast. Other birds winter in Mexico, Central America, and the south-western United States. [7]
They forage actively in the higher branches, often gleaning insects from foliage and sometimes hovering or catching insects in flight. [11] They mainly eat insects and spiders and seeds. Outside of the nesting season, these birds forage in mixed flocks. In winter, they also eat berries and plant nectar, [10] and honeydew directly from the anus of scale insects. [12]
The song of the male bird is a buzzed zee-zee-zee-bzz-zee or weazy weazy weazy weazy twea, [10] somewhat similar to that of its eastern relative, the black-throated green warbler. [8] The call is a sharp tup.
This bird was named after the American ornithologist, John Kirk Townsend. [2] Although Townsend is also credited with first describing this bird, he used a name chosen by Thomas Nuttall, who was travelling with him, and so sidestepped the convention against naming a species after oneself. [7]
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