My wife and I live near the north end of our community bike trail. One night, we were awoken in the early morning hours by a repeated sort of screaming that could lend itself to a mountain lion, but it seemed to follow a repeated pattern that is not too dissimilar to a recording of some kind. We both got up, were able to be fully awake, and observe the sound from our house for the better part of an hour. Mountain lions are not common in Iowa and though sometimes farmers can be known to employ some directed sound to keep things out of their fields, this only happened on that one night and we have yet to experience the noise again.
Submitted by Andy