They have discovered some individuals fly over open water like the Blackpoll warbler. It also will join other species, such as Blackpoll warblers, to feed during the fall. These species include the blackpoll warbler and Bicknell's thrush. This warbler can be confused with the blackpoll warbler ("Setophaga striata"). The blackpoll will opt for berries in migration and during winter. Blackpoll warblers are common breeders in conifer stands in river valleys. Blackpoll warblers commonly nest in a relatively low site of a conifer. In fall, nonbreeding Bay-breasted Warblers may look very similar to Blackpoll Warblers ("Setophaga striata"). The blackpoll warbler's transoceanic flight has been the subject of over twenty-five scientific studies. Blackpoll warblers have the longest migration of any species of New World warbler. The blackpoll warbler ("Setophaga striata") is a New World warbler. The blackpoll has a deliberate feeding style with occasional flitting, hovering and hawking around branches. The summer male blackpoll warblers have dark-streaked brown backs, white faces and black crowns.