I was at Mink Brook in Hanover this morning, and all of a sudden the trees around me were full of warblers. There were at least 50 birds in a 10 minute period. They were moving through so fast, and they were so high in the trees, with horrible backlighting, so identification was difficult. Merlin didn't pick any of them up, but when I downloaded the 100 plus photos I took and adjusted the lighting, I was able to positively identify Magnolia, Nashville, Pine, Cerulean, Yellow-rumped, Black-throated Green and Chestnut-sided. Pretty amazing.