Black-throated green warbler explained

The black-throated green warbler (Setophaga virens) is a small songbird of the New World warbler family.

Description

It has an olive-green crown, a yellow face with olive markings, a thin pointed bill, white wing bars, an olive-green back and pale underparts with black streaks on the flanks. Adult males have a black throat and upper breast; females have a pale throat and black markings on their breast.

Measurements:^[1]

• Length: 4.3-
• Weight: 0.3-
• Wingspan: 6.7-

Habitat and distribution

The breeding habitat of the black-throated green warbler is coniferous and mixed forests in eastern North America and western Canada and cypress swamps on the southern Atlantic coast, with preference for dense stands of conifers.^[2] These birds' nests are open cups, which are usually situated close to the trunk of a tree.

These birds migrate to Mexico, Central America, the West Indies and southern Florida. One destination is to the Petenes mangroves of the Yucatán. Some birds straggle as far as South America, with the southernmost couple of records coming from Ecuador.

Hybridization

The black-throated green warbler has been reported to hybridize with the congeneric Townsend's warbler where their range overlaps in the Rocky Mountains.^[3]

Behavior

Black-throated green warblers forage actively in vegetation, and they sometimes hover (gleaning), or catch insects in flight (hawking). Insects are the main constituents of these birds' diets, although berries will occasionally be consumed.

The song of this bird is a buzzed or . The call is a sharp .^[4]

This bird is vulnerable to nest parasitism by the brown-headed cowbird.^{[5] [6]}

References

• Book: Curson. Jon. Quinn. David. Beadle. David. New World Warblers. London. 1994. Christopher Helm. 0-7136-3932-6.
• Book: Stiles . Skutch. A guide to the birds of Costa Rica. 1989. Comstock. 0-8014-9600-4.
• Book: World Wildlife Fund. 2010. Encyclopedia of Earth. Petenes mangroves. Mark McGinley. C. Michael Hogan. C. Cleveland. National Council for Science and the Environment. Washington, DC.

External links

• Black-throated green warbler - Dendroica virens - USGS Patuxent Bird Identification InfoCenter
• Black-throated green warbler species account - Cornell Lab of Ornithology

Notes and References

1. Web site: Black-throated Green Warbler Identification, All About Birds, Cornell Lab of Ornithology. 2020-09-30. www.allaboutbirds.org. en.
2. Robichaud . Isabelle . Villard . Marc-Andre . 1999 . Do black-throated green warblers prefer conifers? Meso- and microhabitat use in a mixedwood forest . The Condor . 101 . 2 . 262–271. 10.2307/1369989 . 1369989 .
3. Toews . David P.L. . Brelsford . Alan . Irwin . Darren E. . 2011 . Hybridization between Townsend's Dendroica townsendi and blackt-hroated green warblers D. virens in an avian suture zone . Journal of Avian Biology . 42 . 5 . 434–446 . 10.1111/j.1600-048X.2011.05360.x.
4. Web site: Black-throated Green Warbler Audubon Field Guide . 2024-06-14 . www.audubon.org . en.
5. Pitelka . Frank A. . 1940 . Breeding Behavior of the Black-throated Green Warbler . The Wilson Bulletin . 52 . 1 . 3–18. 4156892 .
6. Morse, D. H. 1993. Black-throated Green Warbler (Dendroica virens). In The Birds of North America, No. 55 (A. Poole and F. Gill, eds.). Philadelphia: The Academy of Natural Sciences, Washington, DC: The American Ornithologists’ Union.