Last year while calling we had an animal come in and we could only see one eye glowing, that animal stayed in the same area for 20 minutes and would only move a little bit but never came closer than about 75 yards. finally after nothing worked and i had no idea what it was, i started walking toward it and it ran and would stop and look back at me once in a while. i could only ever see one eye glowing, my buddy said the same thing. After checking the tracks in the snow it was a coyote. must have had something wrong with the one eye.