Blue-winged Warbler
Encyclopedia
The Blue-winged Warbler, Vermivora cyanoptera, is a fairly common New World warbler
New World warbler
The New World warblers or wood-warblers are a group of small, often colorful, passerine birds restricted to the New World. They are not related to the Old World warblers or the Australian warblers....

, 11.5 cm long and weighing 8.5 g. It breeds in eastern North America
North America
North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

 in southern Ontario
Ontario
Ontario is a province of Canada, located in east-central Canada. It is Canada's most populous province and second largest in total area. It is home to the nation's most populous city, Toronto, and the nation's capital, Ottawa....

 and the eastern USA. Its range is extending northwards, where it is replacing the very closely related Golden-winged Warbler
Golden-winged Warbler
The Golden-winged Warbler, Vermivora chrysoptera, is a New World warbler, 11.6 cm long and weighing 8.5 g. It breeds in eastern North America, southeastern Canada and the eastern USA...

, Vermivora chrysoptera. It was formerly called Vermivora pinus, but this name is invalid, as it was given after descriptions of this species and the Pine Warbler
Pine Warbler
The Pine Warbler, Dendroica pinus, is a small songbird of the New World warbler family.These birds have white bellies, white wing bars, dark legs and thin, relatively long pointed bills; they have yellowish lines over their eyes. Adult males have olive upperparts and bright yellow throats and...

.

It is migratory
Bird migration
Bird migration is the regular seasonal journey undertaken by many species of birds. Bird movements include those made in response to changes in food availability, habitat or weather. Sometimes, journeys are not termed "true migration" because they are irregular or in only one direction...

, wintering in southern Central America
Central America
Central America is the central geographic region of the Americas. It is the southernmost, isthmian portion of the North American continent, which connects with South America on the southeast. When considered part of the unified continental model, it is considered a subcontinent...

. It is a very rare vagrant
Vagrancy (biology)
Vagrancy is a phenomenon in biology whereby individual animals appear well outside their normal range; individual animals which exhibit vagrancy are known as vagrants. The term accidental is sometimes also used...

 to western Europe
Europe
Europe is, by convention, one of the world's seven continents. Comprising the westernmost peninsula of Eurasia, Europe is generally 'divided' from Asia to its east by the watershed divides of the Ural and Caucasus Mountains, the Ural River, the Caspian and Black Seas, and the waterways connecting...

, with one bird wandering to Ireland
Ireland
Ireland is an island to the northwest of continental Europe. It is the third-largest island in Europe and the twentieth-largest island on Earth...

.

Life history

The breeding male Blue-winged Warbler is unmistakable. It is yellow above and below. The wings are gray with two white bars, and there is a black eye stripe. Females are duller, but otherwise similar.

The breeding habitat is open scrubby areas. Blue-winged Warblers nest on the ground or low in a bush, laying 4-7 eggs in a cup nest.

These birds feed on insect
Insect
Insects are a class of living creatures within the arthropods that have a chitinous exoskeleton, a three-part body , three pairs of jointed legs, compound eyes, and two antennae...

s, and spider
Spider
Spiders are air-breathing arthropods that have eight legs, and chelicerae with fangs that inject venom. They are the largest order of arachnids and rank seventh in total species diversity among all other groups of organisms...

s.

The song is a series of buzzing notes. The call is a sharp chip.

This species forms two distinctive hybrids with Golden-winged Warbler. The commoner, genetically dominant Brewster's Warbler is gray above and whitish (male) or yellow (female) below. It has a black eye stripe and two white wing bars.

The rarer recessive Lawrence's Warbler has a male plumage which is green and yellow above and yellow below, with white wing bars and the same face pattern as male Golden-winged. The female is gray above and whitish below with two yellow wing bars and the same face pattern as female Golden-winged.

External links

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