August 6, 2014 Humphreys County, TN NWR Duck River Unit Pool 1 area 7:05pm Yesterday evening while hoping to see Caspian Terns I observed a large gull flying over the river adjacent to Pool 1. This may not be the most diagnostic description but the following are my remarks from my ebird report. "Seen out over river, large immature gull. My first thought was immature Herring or Lesser Black-backed. Mottled with brown/white all over, less so around head and undersides. Did show whitish rump and bill was darker towards tip of bill." I did not note the leg color and there was more white around the head and undersides. Any thoughts, suggestions, or tips appreciated. Stanley York Jr. Palmyra/Montgomery Co.