Re: UFO ? I don't know.
Dear group;
I think the *UFO* happens to be a lightning bug (AKA a firefly). The reason why the ends look to be squared off is because the camera's sensor is a lower quality CCD element and thus it is not capable of edge *smoothing* or *rounding* to any great degree, therefore a dimly lit luminous object, such as the one in the original two photos, becomes a long rectangular shape.
In the one IR converted photo, we can see that the lighning bug was actually flashing during the time that the IR lumination device lit up, thus capturing the lightning bug's actually flash trail in the photo. The other converted photo shows the square pixelation of the surrounding scene, thus turning the background brush into square blocks.
Your friend;
LAMAR