Grey Heron(Ardea cinerea)

Now this is one grumpy looking Grey Heron! Is he having more than just a bad 'hair' day or is it that the wind has picked up again and more rain is on the horizon and he's miserable because of the weather, or is it just that Herons look like this by default and are actually happy birds? Poor birds they don't do themselves any favours with that look, I love them looking 'happy' or not!