This made me laugh - well, I was by myself so really it was just a smile.
A lot of trees in public parks have skirts of plastic. The hope is that possums won't be able to climb on the slippery surface - possums in numbers can do an awful lot of damage to a tree. But whoever dressed this tree missed a branch. (Or maybe I'll give them the benefit of doubt and say that a sheet of plastic has gone missing.) A possum would have no trouble climbing up the branch and jumping to the others.