Fall adult male. Note the heavy black side streaking. The spring male would have a solid black throat without the white feather veiling.
Kennesaw Mountain (KMT). August 17, 2012. Since July 21st I have been regularly seeing this migrant at KMT. It has been the most consistent warbler present during this time period. A few other images of this beautiful warbler below. The bird above and the first bird below are clearly fall adult males with their very prominent black throats/upper chest (spring males by contrast have solid jet black without any white in the throat/upper breast). The 3rd bird in comments below is a first fall female(notice the brown patches along the dorsal aspect mixed with the green, and the lack of black in the throat). The second bird in comments below is a fall adult female or first fall male as evidenced by much less black on the throat/upper breast. In addition the second bird below has much less bold lateral side streaking compared to the adult male. All images taken at KMT in the last one month.
Finally I have added another fall female in the 4th spot below. This image more clearly shows the female throat and note the difference between that of the adult male.