Don't know the difference between a tree lopper and an Arborist?
http://ormeautreecompanyblog.iamarrows.com/what-sets-a-tree-lopping-and-an-arborist-apart
One of the very pressing needs following a thunderstorm is to have the branches and leaves of the trees in a compound trimmed. Here a differentiation needs to be manufactured involving the Arborist and the tree