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L. 13 cm (5"); W. 9-10 g
Female and Immature Male: Similar to male, but has yellow throat, wingbars instead of wingpatch, and lighter auriculars.
Autumn plumage identifiers are the double-white wing patch and yellowish tinge to supercillium, sides of neck, throat, breast and upper flanks.
Breeds from Saskatchewan east to Nova Scotia, south to Great Lakes, southern New England, and in the Appalachians to northern Georgia. Widespread in east and midwest in migration.
Most numerous in mixed forests of hemlock (Tsuga), spruce (Picea), and various hardwoods, usually ranging high in trees; in winter in cloud forests and humid tropical montane forests. In migration found in nearly any type of woods.
They usually spend their time gleaning in the upper canopy.
Their diet consists mainly of insects, particularly caterpillars.
The clutch consists of 4 brown-spotted white eggs which are laid in a twig nest lined with lichens, mosses, and hair, usually placed high in a large conifer.
Song: is thin and wiry and increases in speed, becoming almost inaudible to humans, sleet-sleet-sleet-sleet-sleetee-sleeeee. Also tiddly-tiddly-tiddly-tiddly at same speed and pitch.
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