Woke up last night around 4am and heard the strangest sound. It was coming from the bushes around a large pine tree in our backyard. If anything it sounded bird-like, a single note that carried for 7-8 seconds, ending in a downward warble. The closest comparison would be a mourning dove stuck on one strong long note, with that warbly sound on the end. Somewhere in the distance i heard something calling back. i got up and spent a good deal of time at our back door (where the chicken pens are) listening, watching, and turning on the backyard flood lights on occasion to see if i could catch a glimpse. With all the fussing i was doing with the lights, it stopped calling. So, i have gone to sites with animal sound clips. It's not an owl, a coyote, fox, possum, raccoon, skunk, or mink (plus, i don't think we even have mink here). It may not even be a predator, but my thought was that anything that could be a victim of a predator would not be making noise advertising it's location. i might think it was a type of bird, but the sound was coming from the bushes below the tree. Any ideas? i'm stumped.