We're in a fairly wet region of SE NB. A bit boggy in places, the local forest is made up of balsam firs, white and yellow birches, hemlocks, black spruce, a few white pines, a few larch... and numerous fairly large maples ( not sure what kind yet). Many of the maples have a great deal of moss on the limbs - it it correct to assume that the moss is generally not harmful for them?
Moss doesn't hurt the maples, and is good for the general environment, so best to leave it. Maples occurring naturally in NB are Sugar Maple, Silver Maple, Red Maple, Striped Maple, and Mountain Maple; only the first three form large trees, the last two are just large shrubs / small trees.