It was my turn to feed the Schoolhouse Pond meters from about 2 to 4 PM today 
and I could not find anything that resembled a Mew Gull, or a 
Kumlein's/Thayers.   But there was an adult Lesser Black-backed Gull, a lonesome Shoveler and 
2 Mute Swans.   The list:

1 Laughing Gull
1000 Ring-billed Gulls (mostly adult/second year, only a hanful of first 
year) 
300 Herring Gulls (1/3 adult, 2/3 first winter)
1 Lesser Black-backed Gull
3 Great Black-backed Gulls (2 adult, 1 first year)

Paul J. O'Brien
Rockville, Mont. Co., MD