Black-throated Blue Warbler

Setophaga caerulescens

Order

PASSERIFORMES

Family

Wood-Warblers (Parulidae)

Code 4

BTBW

Code 6

SETCAE

ITIS

Egg Color:

White with gray and brown flecks and markings



Number of Eggs:

3 - 5



Incubation Days:

12 - 13



Egg Incubator:

Female



Nest Location:

0 - 3 feet above ground.



Nest Material:

Bark pieces, dried grasses, stems, and leaves with lining of fur, grass, hair, mosses, and rootlets.



Migration:

Migratory



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General

Black-throated Blue Warbler: Small warbler that is the most strikingly sexually dimorphic of all wood warblers. Male has dark blue upperparts, black throat and mask, white underparts, and prominent white wing patch at base of primaries. Female has olive-brown upperparts, olive-yellow underparts, white eyebrow, and white wing patch.

Range and Habitat

Black-throated Blue Warbler: Breeds from Ontario east to Quebec and Nova Scotia, south to Minnesota, Great Lakes, and Connecticut, and in the mountains to northern Georgia. Spends winters in the Greater Antilles. Preferred habitats include mixed deciduous and evergreen woodlands with thick undergrowth, especially mountain laurel.

Breeding and Nesting

Black-throated Blue Warbler: Three to five white eggs, marked and flecked with brown and gray, are laid in a nest made of leaves and grass, lined with cobwebs and hair, and set near the ground in a shrub or young tree. Incubation ranges from 12 to 13 days and is carried out by the female.

Foraging and Feeding

Black-throated Blue Warbler: Feeds on insects and other small invertebrates. During the breeding season, forages from on the ground to high in the forest canopy; male often forages higher than female; locates a high percentage of prey from the lower surface of leaves. Small fruits are often eaten during winter.

Vocalization

Black-throated Blue Warbler: Song is a husky, rising "zwee-zwee-zwee."

Similar Species

Black-throated Blue Warbler: Tennessee Warbler has unbroken white line behind eye and lacks white wing patch. Orange-crowned Warbler has yellow to green upperparts and yellow-green underparts.

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UnderpartsX

Belly, undertail coverts, chest, flanks, and foreneck.

UpperpartsX
Back, rump, hindneck, wings, and crown.
EyebrowX
Also called the supercilicum or superciliary it is the arch of feathers over each eye.
PrimariesX
The primaries are the flight feathers specialized for flight. They are attached to the "hand" equivalent part of the wing.
Parts of a Standing bird X
Head Feathers and Markings X
Parts of a Flying bird X