Blackburnian Warblers are around 11 to 13 cm (4.3 to 5.1 in) long, with a 20 to 22 cm (7.9 to 8.7 in) wingspan, and weigh 8 to 13 g. In summer, males display dark gray backs and double white wing bars, with yellowish rumps and dark brown crowns. The underparts are white, tinged with yellow and streaked black. The head is strongly patterned in yellow and black, with a flaming-orange throat. Basic plumages show weaker yellows and gray in place of black in the breeding male.
Habitat and Distribution
Blackburnian Warblers are solitary during winter and highly territorial on their breeding grounds. However, during migration, they often join local mixed foraging flocks.Breeding is done, from southern Canada, to the southern Canadian Prairies, the Great Lakes region and New England, to North Carolina. They winter in southern Central and South America in tropical montane forests.
These birds are mainly insectivorous , but will include berries in their diet in winter. They forage for insects or spiders in tree tops.
The nest consists of an open cup of twigs, bark, plant fibers, and rootlets held to branch with spider web and lined with lichens, moss, hair, and dead pine needles that's placed near the end of a branch. 3-5 whitish eggs are laid its nest which is usually placed 2 to 38 m above the ground, on a horizontal branch.
Calls and Songs
Blackburnian Warblers' songs are a simple series of high swi notes, which often ascend in pitch. Their call is a high sip.