I have to admit that I didn't know that 'chirping' was a mountain lion thing. But, there's a new video share that shows one of these big cats chirping on a neighbor's porch.
Imagine sitting in your living room, engrossed in a TV show, Facebook, work....whatever. Then from the corner of the room you hear a faint, muffled, "Reooooooow."
You ignore it. Thinking it's one of your cats in a different room. Under a bed...