This is a radar image from overnight on August 20-21, 2015. As you can see there were a lot of birds in the air moving south from the Mid-Atlantic as far west as this image goes. The cold front and associated heavy rain and thunderstorms that brought the helpful northerly winds was advancing from the eastern Mid-Atlantic slowly into New England. They are really coming now! As we near September the volume and diversity of species heading south will build for us. Get out there this weekend and go find some “fall” migrants.