Flying invisible Manta Rays on Long Island...

excerpted:

Finally, after a few minutes, he looked over my head and yelled "oh my god! What *is* that?!" - I turned to look and 'flying' directly over my head was this huge creature I'd never seen! I will detail as best I can:

It appeared translucent/transparent; no color whatsoever - no visible structure outside of the motion which indicated what it looked like; now, I myself am a visual artist, so this left a very distinct impression on me. This 'creature' was shaped and moving in the way a Manta Ray would; yet completely transparent! No color at all; I could see the stars through this thing; the only thing to allow the structure any appearance was the moonlight shining somehow on its' exterior!