The Warbler on the left is uncommon and breeds in the boreal forest during winters in northern South America. The Warbler on the right is a small songbird of eastern and central North America.
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.
