This reminds me of one of the moment in a cowboy movie where the poor unsuspecting pilgrim stumbles into the wild bloodthirsty apache's burial grounds.
I am thinking it was hung on the branch because animals don't usually die like that. Also: a predator would not be hanging it like that. But it is a super effective photo.
Mary MacADNski: My friend had gone for a walk in the woods behind the house where she grew up. She knew this was the skeleton of one of the dogs they had as children. It had been buried there 40 years before. She probably hung it like that.