This page is a pretty good analysis of birds, bugs etc.. and what appear to be flying rods. (They call them rainbow rods in the article)
www.forteantimes.com...
Its an investigative article, and the author tries various scenarios of recording and capturing different animals, insects on film.
The guy who discovered them has a site at
www.roswellrods.com...
If they are ufo's, and not misidentified known objects, perhaps they are probes of some kind?
[Edited on 4-29-2003 by William One Sac]