Deer whistles

My new deer whistles must be working.

The license plate was crumpled before I installed them. They are the two black things mounted on the bumper. One is “open” and the other is closed but I can’t hear anything. Perhaps the deer can because none have jumped out at me on the road since I installed them.

The one big problem is they make me drive faster. I am (perhaps falsely) confident I won’t see any deer and that by driving faster, the wind will flow through the whistles at a higher velocity and make them louder.

Oh yes. And apparently moose can’t hear them!