Despite the weather, the birding was good around Lake Bomoseen yesterday (including the marshes at the north end and Love's Marsh). 
There were a good number of gulls at Crystal Beach including what I believe were two Lesser Black-backed Gulls. See photos in the checklist: https://ebird.org/view/checklist/S55710818

Seven Bonaparte's Gulls were also present. 
At the 'Green Dump' (the upper lot of the Kehoe Fishing Access on the west side of the lake), there was quite a bit of activity: Warbling Vireo, Blackburnian, Black-throated Green, Louisiana, Yellow-rumped and Black-and-white warblers, Blue-headed Vireo, and Ruby-crowned Kinglet. 
There were a gazillion swallows everywhere along with two Purple Martins on Avalon Beach Road.
Sue Elliott