This species is relatively uncommon at Powdermill. The lack of a molt limit in the alula feathers (A1,A2,A3) indicates this is an adult bird. Its closest relative, the Golden-winged Warbler, is much less common. The rapidly declining Golden-winged Warbler is currently being petitioned to be granted Federal protection under the Endangered Species Act.
Powdermill Nature Reserve’s avian research center is part of Carnegie Museum of Natural History’s biological research station in Rector, Pennsylvania. The research center operates a bird banding station, conducts bioacoustical research, and performs flight tunnel analysis with the goal of reducing window collisions.