I'm not sure those deer whistles work. On the highways down in Texas,
the car comes over a hill at night, at 70 mph and finds a herd of Whitetail crossing the road.
But before the driver can hit the brakes, a 156 pound deer hits him in the face.
I think it's very likely the bat didn't get hit by a blade.. I've seen thousands
of bats flying at full speed, catching mosquitoes, their sonar is excellent.
That's why you never see a bat get hit by a car. But birds aren't as aware..
If bats were really getting killed by wind mills, we would have noticed it many years ago.