Bird name:

Black-throated Gray Warbler

Dendroica nigrescens

Order

PASSERIFORMES

Family

Wood Warblers (Parulidae)

Code 4

BTYW

Code 6

DENNIG

ITIS

178896

Breeding Location:

Forest edge, Scrub vegetation areas

Breeding Type:

Monogamous, Solitary nester

Breeding Population:

Fairly common to common

Egg Color:

White with purple and brown spots and blotches

Number of Eggs:

4 - 5

Incubation Days:

Egg Incubator:

Female

Nest Material:

Plant fibers, grasses, weed stalks, with lining of feathers, animal hair, mosses, and flower stems.

Migration:

Migratory

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General

Black-throated Gray Warbler: Small warbler with black-marked, slate-gray upperparts, black streaks on flanks, and white underparts. Head has black hood and throat, sharply contrasting white eyebrow and cheek stripe, and yellow spot in front of eye. Wings are dark with two white bars. Female has white throat and thick, black eyestripe. Juvenile is similar to female but with less black.

Range and Habitat

Black-throated Gray Warbler: Breeds from southern British Columbia (except Vancouver Island), Washington, Idaho, and Colorado southward. Spends winters in the southwest U.S. and Mexico. Preferred habitats include shrubby openings in coniferous forests or mixed woods, dry scrub oak, pinyon and juniper, chaparral, and other low brushy areas.

Breeding and Nesting

Black-throated Gray Warbler: Four to five white eggs, with brown and purple spots and blotches, are laid in a tightly woven plant-fiber cup in a bush or tree, usually less than 10 feet above the ground. Eggs are incubated for approximately 12 days by the female.

Foraging and Feeding

Black-throated Gray Warbler: Feeds mainly on insects such as moths, butterflies, beetles, and ants. Also eats leaf galls and a few spiders.

Readily Eats

Sugar Water, Fruit, Nut Pieces

Vocalization

Black-throated Gray Warbler: Song is a series of buzzes, rising in pitch and intensity, and then falling: "zee zee zee zee bzz bzz." Call is a dull "tup."

Similar Species

Black-throated Gray Warbler: Black-and-white Warbler has more heavily streaked breast, striped crown, and prefers to forage on trunks and main branches of trees rather than in leaves and smaller twigs.

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Bird Call Credits: The Macaulay Library of Natural Sounds at the Cornell Lab of Ornithology. Martyn Stewart, http://www.naturesound.org, Redmond, Washington USA. The reuse or copying of bird calls in this database is strictly forbidden.

Underparts

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

Upperparts

Back, rump, hindneck, wings, and crown.

Eyebrow

Also called the supercilicum or superciliary it is the arch of feathers over each eye.

4 and 6 letter alpha codes

The four letter common name alpha code is is derived from the first two letters of the common first name and the first two letters of common last name. The six letter species name alpha code is derived from the first three letters of the scientific name (genus) and the first three letters of the scientific name (species). See (1) below for the rules used to create the codes..

Four-letter (for English common names) and six-letter (for scientific names) species alpha codes were developed by Pyle and DeSante (2003, North American Bird-Bander 28:64-79) to reflect A.O.U. taxonomy and nomenclature (A.O.U. 1998) as modified by Supplements 42 (Auk 117:847-858, 2000) and 43 (Auk 119:897-906, 2002). The list has been updated by Pyle and DeSante to reflect changes reported by the A.O.U from 2003 through 2006.

Field Guide to Birds of North America