Could you please identify this bug? Is it harmful to the vegetation in my yard? I live in coastal North Carolina. Thank you
Looks like you have an infestation of Wooly Aphids. You did not provide us with information on the host plant, but it appears it might be an apple tree, in which case the Wooly Apple Aphid, Eriosoma lanigerum, is most likely your species. They are harmful. There is a webpage with additional information.