Black-throated Gray Warbler
Black-throated Gray Warbler
Setophaga nigrescens
At a Glance
This strikingly patterned warbler is typical of semi-arid country in the West. It is often common in summer in the foothills, in open woods of juniper, pinyon pine, or oak, where its buzzy song carries well across the dry slopes. Of all the western warblers, this is the one that shows up most often in the East, but it is still rare enough there to provide excitement for eastern birders.
All bird guide text and rangemaps adapted from by Kenn Kaufman漏 1996, used by permission of Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Category
Perching Birds, Wood Warblers
IUCN Status
Least Concern
Habitat
Arroyos and Canyons, Desert and Arid Habitats, Forests and Woodlands, High Mountains, Shrublands, Savannas, and Thickets
Region
California, Florida, Mid Atlantic, Northwest, Plains, Rocky Mountains, Southeast, Southwest, Texas, Western Canada
Behavior
Direct Flight, Flitter
Population
3.200.000
Range & Identification
Migration & Range Maps
In the Southwest, arrives early in spring and lingers late in fall, with some remaining through the winter. A rare stray east to the Atlantic Coast, mostly in fall.
Description
5" (13 cm). Strong face pattern with black cheeks, solid black crown. Blackpoll has white cheeks, Black-and-white has striped crown. Female grayer, may have throat mostly white.
Size
About the size of a Sparrow
Color
Black, Gray, White, Yellow
Wing Shape
Rounded
Tail Shape
Notched, Square-tipped
Songs and Calls
Song a series of buzzes, rising in pitch and intensity, then falling: zee zee zee zee bzz bzz. Call is a dull tup.
Call Pattern
Falling, Flat, Rising, Undulating
Call Type
Buzz, Chirp/Chip
Habitat
Dry oak slopes, pinyons, junipers, open mixed woods. Breeds in dry coniferous and mixed woods, especially of oak, juniper, and pinyon pine. Also frequents manzanita thickets and chaparral. Prefers open areas, as in second-growth, forest edges, or dry hillsides or canyons. In winter in Mexico, found in lowland dry forest, dense thorn scrub, and pine-oak woods.
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Behavior
Eggs
Usually 4, sometimes 3-5. Creamy white, with brown marks often concentrated at larger end. Incubated by female for unknown number of days.
Young
Both parents feed the nestlings. Age at which young leave the nest is not well known. Normally only 1 brood per year.
Feeding Behavior
The most common method of foraging during the breeding season is by searching for insects among leaves of low growing foliage; also hovers briefly to pick insects from various surfaces. Also flies out after flying insects. In migration and winter, often forages in mixed flocks with other species.
Diet
Mostly insects. Diet is not known in detail. Known to feed especially on oakworms and other green caterpillars.
Nesting
Details of nesting behavior not well known. Males arrive on breeding grounds in March or April in southern part of the range, in late May in the north. Nest site varies; may be 4-10' from trunk on horizontal branch in larger tree such as fir or oak, or closer to the main trunk in a smaller tree or shrub. Usually placed 7-35' above the ground, but can be 1-50' up. Nest is a neat, open cup, built probably by both sexes, made of weeds, dry grass, and plant fiber; lined with feathers, fur, hair, and moss.
Climate Vulnerability
Conservation Status
Common and widespread in the west.
Climate Threats Facing the Black-throated Gray Warbler
Choose a temperature scenario below to see which threats will affect this species as warming increases. The same climate change-driven threats that put birds at risk will affect other wildlife and people, too.