If you do any drawing or painting you might be familiar with the stress of a blank page or canvas. So how Tommy Craggs doesn't get overwhelmed when he sees a blank tree, I have no idea. But he sure knows how to work magic.
If you're worried about the trees... He never cuts them down for the purpose of carving them, he uses dead pieces, found after storms for example, or trees that had to be cut for woodland management. So there's no harm done.
You can follow him on Facebook to stay updated on his new works. Or check out his website for a beautiful gallery of things he has made in the past. Also, if you live in the UK you might be able to see him work at events sometimes.