Black-throated Green Warbler

Dendroica virensOrder: PASSERIFORMES Family: Wood Warblers (Parulidae)

Codes: Common Name: BTNW Scientific Name: DENVIR ITIS Taxonomic No.: 178898

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Overview

Black-throated Green Warbler: Medium-sized warbler with olive-green upperparts, black-streaked flanks, and white underparts. Face is yellow with black eyestripe and bill. Crown is olive green. Throat and upper breast are black. Wings are dark with two white bars. Tail is dark. Black legs and feet.

Range and Habitat

Black-throated Green Warbler: Breeds from eastern British Columbia, Ontario, and Newfoundland south to Alberta, Minnesota, Ohio, northern New Jersey, and in the mountains to Georgia. Spends winters from Florida and Texas southward. Preferred habitats include open stands of hemlock or pine.

Topo Map: Perching-like Body

Listen to Call

Similar Sounding

Voice Text

"trees-trees--trees", "zay-zay-zoo-zeee"

Interesting Facts

The male Black-throated Green Warbler sings persistently during the breeding season. One individual was observed singing 466 songs in one hour.

Unlike other related wood warbler species, they are not known as a major predator of spruce budworms, except when the insect is at epidemic levels.

Their population appears to be increasing in the southern parts of their breeding range, but decreasing in the north. This decline comes from the loss of mature forest on wintering grounds. Another reason is aerial spraying to control spruce budworms and other forest pests.

A group of warblers has many collective nouns, including a "bouquet", "confusion", "fall", and "wrench" of warblers.

Bird Term Glossary

Author

Gary Owen Dick

Artist

Imran Kahn

Range Map for Black-throated Green Warbler

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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.

Black-throated Green Warbler

● Song: "trees-trees--trees", "zay-zay-zoo-zeee"

● Foraging & Feeding: Black-throated Green Warbler: Eats insects, fruits, and seeds.

● Breeding & nesting: Black-throated Green Warbler: Three to five brown and purple marked, white or gray eggs are laid in a cup of grass, moss, and plant fibers, lined with hair and feathers, and built on a branch of a conifer. Female incubates eggs for about 12 days.

● Similar species: Black-throated Green Warbler: Golden-cheeked Warbler has black crown and eye-line.

Flight Pattern

Weak flight on rapidly beating wings.

Black-throated Green Warbler Body Illustration

● Range & Habitat: Black-throated Green Warbler: Breeds from eastern British Columbia, Ontario, and Newfoundland south to Alberta, Minnesota, Ohio, northern New Jersey, and in the mountains to Georgia. Spends winters from Florida and Texas southward. Preferred habitats include open stands of hemlock or pine.

^BreedingMonogamous, Solitary nester

^PopulationFairly common

^MigrationMigratory

^Weight0.3 Ounces

Perching-like Body

Underparts

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

Upperparts

Back, rump, hindneck, wings, and crown.

Breast

The upper front part of a bird.

Crown

The crown is the top part of the birds head.

Face

The front part of the head consisting of the bill, eyes, cheeks and chin.

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