I've been to Stephenville several times. I must have missed the swamps. BTW, here's a photo I found from there:
Not a UFO, but I wouldn't have believed it if somebody had told me about it.
BTW, Stephenville is about 90 miles northwest of Fort Hood. I've seen some pretty weird stuff flying around, and it usually came out of Hood. Just a possibility.
Mmmmmmm, rattlesnake !!!