I smell something.

I'm moving on from ears to the nose. This guy stopped in front of the camera one morning and knew something was up but couldn't localize the the camera.

Technical: I stopped using scent blockers a few years ago and use time to degrade human scent. A camera is left in place at least a week before being checked and frequently for several weeks. It will be interesting to see if he is more relaxed the next time he passes by.