I love Birch trees too. These are extremely 'funky' and beautiful! Is this some kind of effect that you've added to them, because I've never seen this before, but I like it a lot!
Lorena - It looks like large animals have used these trees as scratching posts. Perhaps moose, rubbing the velvet off their antlers, while marking their territory at the same time. It appears that there is a rather dramatic background with snow-capped mountains in the background. Thad