We just happened to notice one night when we are on the back porch. Course it was NIGHT --- how much can you see? BUT --- a few years prior I had given the dh a night scope for Xmas sooooo we were able to see him quite well using that. What was really cool too was that we could hear him/her??? screeching which sounds a lot like someone trying to do scary sounds for Halloween -- not really a screech.
Well, here:
http://www.allaboutbirds.org/g...
it's the second sound you hear on there --- soooo funny! Like a bad imitation of a witch sound.