Description

All plumages have a dark horizontal line that runs from the bill to the eye and whitish wingbars. Differences of age and sex in plumages are slight. Typically, this species exhibits green plumage on the upperparts, yellow on the underparts and the crown and white undertail coverts.

Although there is territorial overlap with the Golden-winged Warbler, the Blue-winged Warbler is more generalized in its requirements and having tolerance for later succession habitats that have plentiful undergrowth such as shrubs, herbs and weeds.

Although quite similar to that of the Golden-winged Warbler, the typical song of the Blue-winged Warbler is described as distinctive and is represented by "beee, bzzz."

Golden-winged Warbler and Blue-winged Warbler hybrids.

The foraging behaviour is similar to that of the Golden-winged Warbler, although the Blue-winged Warbler tends to feed at lower heights, such as hover-gleaning from leaf surfaces for insects.
Although very different in plumage, Blue-winged and Golden-winged Warblers are closely related and often hybridize where their habitat ranges come into contact.

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