IUCN Conservation Status: Least Concern
One of the most secretive and least observed of all North American birds, the Swainson's Warbler is a skulking bird of the southern canebrakes and rhododendron thickets. If it weren't for its loud, ringing song, the presence of the species in many areas would go completely undetected.
Song a series of loud, ringing, descending slurred whistles, ending in four or five jumbled notes. "So, so, so, so, sweet-to-hear."