Angry bird...

On the other day, when I was walking in the woods, I have noticed that there are many quite disturbed trees. Most of them are just bark peeled off like this.

It is the work of woodpecker (I think… cant think of any other) and quite often you see these. But on this area, it was just lots of trees affected by it.

As I continued the path, I came across this

The work of art? or what can I say… first I could not figure out what exactly is…

I think this is also the handy work (or should I say “beak work”) of woodpecker?
I just haven’t seen anything like this big. Also I have noticed that very close to the ground was carved. The bird like this usually does not like to spend long time close to the ground, so made me wonder, “Is this really by woodpecker? Or was it just really angry (hungry) bird?”