Blackburnian Warbler - Ecology

Ecology

Blackburnian Warblers are solitary during winter and highly territorial on their breeding grounds and do not mix with other passerine species outside of the migratory period. However, during migration, they often join local mixed foraging flocks of species such as chickadees, kinglets and nuthatches. These birds are basically insectivorous, but will include berries in their diets in wintertime. They usually forage by searching for insects or spiders in treetops. The breeding habitats of these birds are mature coniferous woodlands or mixed woodlands, especially ones containing spruce and hemlocks. It typically winters in tropical montane forests.

Blackburnian Warblers build a nest consisting 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 2–38 m (5–80 feet) above the ground, on a horizontal branch.