|Clearly not one of my better artistic achievements.|
In case you'd like to see what these magnificent creatures look like and sound like up close, here for comparison is somebody else's non-crappy short video showing one in captivity (turn the volume on your computer back down before hitting 'play'!).
So listen for their haunting calls the next time you find yourself walking along West Walker or the eastern section of Centerpointe Drive. I have no idea what prompted all this hooting last night, given that I had not heard them on previous recent walks, but they were literally calling out every thirty seconds. If cars are flying by on West Walker, the sound will be obscured by the noise, but when a gap in traffic comes, you might be able to hear them coming through loud and clear in all their mysterious feathered glory.