What's Behind the Heron?

I'm sure you've asked yourself many, many times....what's behind the Heron? I know it keeps me awake at night.!! 

Every time I look out of the window there seems to be a Heron flying past whatever it is I'm trying to look at.!!

Perhaps to pass the time, you could maybe help me to get a decent nights sleep by working out just what it is that's behind the Heron.

Remember though, it's just for fun. :-)

Slightly less challenging views HERE if it looks a bit too much. :-)

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Good luck. :-)