The age of this bird is usually identifiable with a quick examination of the throat feathers. If the black throat has extensive yellow tipping it is a hatching-year and if it lacks this tipping (or has very little) it is an after-hatching-year.
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.