Swainson’s Warbler


Swainson’s warblers reside on Roanoke River National Wildlife Refuge from April through October, nesting in the river cane understories of bottomland hardwood forests. They eat insects. Swainson’s warbler migrates to Central American and the West Indies for the winter.
Swainson’s warblers make bulky nests of leaves line with fine rootlets. They lay 3 or 4 eggs that are globular and creamy white occasionally spotted with reddish-brown or tinged with blue of green. Eggs hatch 14 or 15 days after they are laid. The young stay in the nest for 10 to 12 days and beg for food for an additional 2 to 3 weeks.
Swainson’s warblers are very plain brown warblers with rusty caps that are 5 ½ to 6 ½ inches long and have a wingspan of 9 inches. They have white lines above their eyes and brown lines through their eyes.