two black objects seemed like they flutteredAt approximatly 1820 I was walking north shortly after sunset on a clear evening. I noticed an airliner approaching far to the west. Then I saw what appeared to be two black fluttering objects moving towards the east. They sort of dipped and weaved across the sky. I noticed what appeared to be a small orange light coming from the rear of the objects. I thought that they were stealth fighter aircraft, however, there were no lights and no sound. They soon disappeared in the east. An commericial airplane took off from Logan Internation above the rims about this time. This was the second time in two weeks that I have seen a strange object(objects) at the same location, at the same time (1820), moving in the same direction.