I lean towards an owl; although, in my experience they generally eat the head for the brains. I have no faith in flashing lights including the commercially available products. One of the beagle clubs that I go to put up several of these lights. I pointed out the gut pile from a freshly killed rabbit at the base of one of these poles and the owl castings around almost all of the poles. Predators become habituated to humans and their actions including lights.