DISCUSSION
In concordance with previously described habitat (Bangs, 1918) and morphological (Sprunt, Jr., 1953) differences, we provide strong evidence that black-throated green warblers breeding along the southern Atlantic Coastal Plain of the United States are genomically distinct from the nominate subspecies found throughout much of the forested portions of eastern North America. As such, this isolated population is worthy of classification as a true subspecies and thus deserves conservation and management efforts required to sustain its persistence.