Related article:
Why Icelanders are wary of elves living beneath the rocks
http://www.freerepublic.com/focus/f-chat/3170921/posts
Maybe there is some truth to their belief in elves, gnomes, or whatever name you want to give to these creatures.
“. The images were taken consecutively and 1-second apart. It is not a leaf in the foreground or any type of weed or plant. My camera detects heat and motion, so whatever this was, it gave off heat and also moved.”
A motion detector that also senses heat? Sounds a bit extreme. Out of idle curiosity I checked the website he linked and ii found as mention of motion detecting but no mention of heat sending.