Migration Info The Northern Parula has one of the most prolonged migrations of any North American warbler. Significant numbers of this species appear along the Texas coast in late February, and continue to move northward through this region through May. Northern breeders passing through the southern states in May are crossing paths with local birds that have already fledged young. The Northern Parula is quite common in winter in all parts of the West Indies; the species is also found in eastern Central America, although it is not abundant anywhere on the mainland. This is one of the few warblers that moves up the Atlantic coast in significant numbers during the spring migration.