Very excellent catch there as always.
I tell you, what I would REALLY love to see is if you have another photograph moments later or from a different angle of the same area. Its always great to take 3-4 consecutive photographs a few seconds apart. That way if you catch something, and you catch it moving or disappearing its just a bit more evidence to add to the pile to show paranormal activity. Even as it stands by itself though, its a great catch! I'm amazed you saw it in the low light conditions.