Thanks for your input!
I can see your reasoning for posting these separately so each instance can stand alone without the overlapping that can occur. I created the thread on this subject to invite members to share what they are finding with their IR cameras, and it seems to be working well in that regard. Those interested in the subject can follow this thread rather than comb through multiple threads, and participation seems to be good despite the overlap problems. I am learning a lot, personally.
I agree wholeheartedly that IR images should be accompanied with standard photos to help viewers understand what they are looking at.
Regarding “trails”, what I am trying to describe is what appears to be a path leading from one place to another, which I am seeing in insulated ceilings. Usually these are about 4 to 8 inches wide, suggesting an area where the insulation is either disturbed or absent, and running several feet. (see attached images). I doubt I would ever say, based on such an image, that there was definitely rodent activity in the attic, but I would be especially watchful for other signs when inspecting the attic.