American Redstarts from last summer. The first image is of a female. Notice the complete lack of black on her face and her pale, yellow flanks. First-year males have varying amounts of black on their heads and much brighter yellowish-orange flanks. Males do not acquire their striking black and orange plumage until their second year.
American Redstarts breed across Canadian forests, south almost to the Gulf of Mexico. They winter in central Mexico south to northern South America. They are often abundant and easy to identify.