In my view, I can see what is clear, to me, a right arm, a left elbow. I can also see the head, but that one might be part of the tree (actually, a wider wood board supporting the thin tree, like in other trees around), but it seems unlikely to me. I can also see the right and left legs of what is probably a boy sitting over a box.

In my perception, I see what is probably 80% of a boy’s body, covered only by a thin tall branch of a young tree.

I would definitely not say it is the picture of only one human.