Black-headed Gull

On a return trip to the Rochester, NH, water treatment plant this week, the Slaty-backed Gull was still absent, but the Black-headed Gull was present, cooperative, and photogenic. There were also several Iceland Gulls and a single Lesser Black-backed Gull among the several thousand Ring-billed, Herring, and Greater Black-backed Gulls. No Glaucous on this day.