Well, a mountain lion has beat us to it. One female lion has chosen her spot for screaming under the sprawling branches of a Ponderosa Pine tree. She spent many nights of February caterwauling under that tree.
My reading says that female mountain lions caterwaul when they are in estrus. The odd thing is that I believe that this is the same mountain lion as we heard caterwauling back in January. Estrus is supposed to last a week at most. Then, there's supposed to be a couple of month delay before they go back into estrus if they didn't get pregnant. So, I'm puzzled by her behavior.
Perhaps her life is too stressful right now so she is blowing off steam by screaming.
Enjoy the video. Be sure to have the sound on to hear her sounds.