- 4.3–4.7 in
- 6.7–7.9 in
- 0.2–0.4 oz
- Paruline à gorge noire (French)
- Verdín de pecho negro (Spanish)
- The male Black-throated Green Warbler sings persistently during the breeding season. One individual was observed singing 466 songs in one hour.
- The male Black-throated Green Warbler tends to sing his "zee-zee-zee-zoo-zee" song near the middle of his territory, largely in the beginning of the breeding season to attract females. He sings the "zoo-zee-zoo-zoo-zee" song mostly around the territory's margins, to deter other males.
- A population of the Black-throated Green Warbler is confined to the coastal plain of Virginia and the Carolinas, 500 km (311 mi) east of, and 1,200 m (4000 feet) lower than, Appalachian birds. These slightly smaller birds are different enough to be considered a separate subspecies, and are found breeding in cypress swamps.
Boreal coniferous forest and transitional coniferous-deciduous forest.
Insects and insect larvae.
- Clutch Size
- 3–5 eggs
- Egg Description
- Whitish with variable brown blotches or speckles.
- Condition at Hatching
- Helpless with sparse down.
An open cup of twigs, grass, bark, and spider silk, lined with moss, hair, and feathers. Typically located at a fork in tree branches, one to three meters (three to ten feet) from the ground.
Gleans from small branches; sometimes hovers and picks prey from leaves and branches.
Populations have been stable through the early 1990s. Logging of coniferous forests negatively affects Black-throated Green Warbler populations, but the species does also breed in second-growth coniferous forest.
- Morse, D. H. 1993. Black-throated Green Warbler (Dendroica virens). In The Birds of North America, No. 55 (A. Poole, and F. Gill, eds.). The Academy of Natural Sciences, Philadelphia, PA, and The American Ornithologists' Union, Washington, D.C.