And I might add that this fungi is not just growing on the bark of what looks to be an Oak tree; it is deeply rooted in and feeding upon dead and rotting heartwood. This means that given just a little time, gravity and wind, this heart rot will have its way with the tree. Judging from the picture and nature itself, this tree could be a clear and present danger, either now or in the near future, to people or property should it be in the vicinity of either or both.