The correct name for the moss ball is "tillansia recurvata", and what is more surprising is that it is not actually moss. It is a plant, a member of the family of "bromeliads", it is a gray group and we can find it attached to branches of various trees.
Many resources will say that ball moss is harmless to trees, but after many years of work and being close to trees every day we have noticed a strong connection between moss and dying branches, what happens is that it wraps around the limb, strangles it and cuts off nutrition.
It does not have a root system, it adheres to substrates by wrapping its stems around a surface, it takes nutrients from the air and the debris that accumulates in the tree, therefore we suggest removing, removing, or cutting it from your trees.