Black-throated Green Warbler

The Black-throated Green Warbler is a strikingly colored warbler with a vivid yellow face bordered by an olive-green crown and back, giving it a warm, glowing appearance even in dense conifer canopy. Breeding males show a solid black throat and upper breast forming a bold bib, while females and immatures show reduced black, sometimes limited to streaking or spotting on an otherwise pale throat.

The wings are dark with two white wingbars, and the flanks are streaked with black. This species is a characteristic breeding bird of northern hemlock and spruce forests, where its buzzy, lazy song is a familiar summer sound, and it is also a common and readily identified migrant across much of eastern North America.

Key Field Marks

• Bright yellow face with a plain, unmarked look framed by an olive-green crown and cheek border
• Black throat and upper breast in breeding males, forming a solid bib
• Olive-green back, unstreaked
• Two white wingbars
• Black streaking along the white flanks

Similar Species

Black-throated Gray Warbler has a gray, not olive-green, back and lacks yellow on the face except for a small spot before the eye. Townsend's Warbler shows a similar black throat and yellow face but has dark auricular patches and streaking on a more heavily marked face, and an olive rather than plain back. Golden-cheeked Warbler, a range-restricted Texas specialist, has a solid black back rather than olive-green.

Habitat

This species breeds in coniferous and mixed forests, with a strong association with eastern hemlock and spruce in the Northeast and Appalachians, and various conifer types elsewhere in its range.

Range

Black-throated Green Warblers breed across a broad swath of Canada and the northeastern United States, south through the Appalachian Mountains. They winter in Mexico, Central America, and the Caribbean.

Migration

This species is a medium- to long-distance Neotropical migrant, moving through much of the eastern United States each spring and fall in substantial numbers.

Behavior

Black-throated Green Warblers forage methodically through the mid to upper canopy, gleaning insects from foliage and occasionally hovering to reach the tips of branches.

Voice

The song has two main variants: an unaccented, lazy 'zee-zee-zee-zoo-zee' and a more emphatic version used near the nest. The call is a flat, sharp 'chip.'

Feeding

It gleans caterpillars, other insects, and spiders from needles and leaves, generally staying higher in the canopy than many other warblers.

Nesting & Breeding

The female builds a compact cup nest of bark strips, twigs, and plant down, typically placed on a horizontal conifer branch. She lays 3-5 eggs, and pairs often return to the same general breeding area in subsequent years.