It looked black with a wing span upon flight maybe 4-5ft. The creature itself while crouched on the roof looked the size of a smaller human maybe 4ft. I watched it trying to figure out what I was looking at, for maybe 1 minute, then it jumped and flew off. Even when it flew away it still looked on the shorter end. As it flew, its legs hung but still in an almost crouching position. It wasn't a massive creature but it was definitely humanoid in appearance. Location was 25 minutes south of Boston around January - February