Boreal Birds
300+ species, billions of birds rely on Canada's boreal forest as critical breeding grounds
© Kevin T. Karlson

Black-throated Blue Warbler, male

© Dick Daniels/Wikimedia Commons (CC 3.0)

Black-throated Blue Warbler

Black-throated Blue Warbler
Dendroica caerulescens
Perching Birds | Family: Wood Warblers, Parulidae

An estimated 16% of the species' North American population breeds within the Boreal Forest.

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Overview

The male is one of the easier warblers to identify since it retains its strikingly patterned plumage year-round. These warblers are among the tamest and most trusting of this family. If an observer moves very deliberately, the bird may be approached to within a few feet (about a meter).

Description

5" (13 cm). Male blue-gray above, white below, with black face, throat, and sides; female dull olive green, with narrow white eyebrow and usually a small, square, white wing patch.

Voice

Song a husky, rising zwee-zwee-zwee.

Nesting

4 brown-spotted white eggs in a nest made of leaves and grass, lined with cobwebs and hair and set near the ground in a shrub or a young tree.

Habitat

Mixed deciduous and evergreen woodlands with thick undergrowth, especially mountain laurel.

Range/Migration

Breeds from western Ontario east to southern Quebec and Nova Scotia; south to Minnesota, Great Lakes, and Connecticut; and in mountains to northern Georgia. Winters in Gulf Coast states (irregularly) and Greater Antilles.