when they move, they almost seem like smoke, but if i catch it in the first millisecond there is a shape, but different shape everytime. when i try to find them or try to see one, so far i find success pretty dependable. i have to have a plain background of light color im finding to notice them. white seems to be the best being they look silver grayish. the color of a pencil actually. it really looks like someone is writing scribbles in front of my face in this air and then the scribble catches wind somehow and drifts by me. really really interesting, even if this is just a mind trick or eye trick or whatever. peace to all, lynette