Do you see what I see?

Brrrrr it had been cold today, but the sun was shining so that was fine by me. I went out for a walk this morning and took this photo of an opening high up in the tree trunk. I thought it looks like a little hedgehog peeping out of the tree, what do you think? J has been in the hobby room most of the day, but at least it keeps him quiet, although he does talk to himself rather a lot.