We just moved here 2 months ago. And we have been hearing what we call a "banshee" when we go out to close up the coop. We have only heard it a handful of times, but tonight it is really going. Jessica thought it was a rabbit in the field being killed. I thought it was a peacock, but my kids who have them at their Dad's house say no. Maybe an owl? I don't think it is a mountian lion because it doesn't sound like a woman screaming. Any ideas as to what else screeches at night? We are in the Sierra Nevadas, western side, in Grass Valley, elevation 2400 if that helps.