The soundscape is almost completely natural. Few ships or aircraft pass to disturb the natural tranquility. Occasionally military or Coast Guard helicopters fly low over the beach, but these disappear quickly. The only major sources of noise are the vehicles and infrequent portable stereos of visitors near the Malaquite Visitors Center. Few of these venture farther than a few miles south of the end of the park road at the entrance to South Beach.
Maine ocean islands provide the only nesting sites for Atlantic puffins in the United States. Eastern Egg Rock in the midcoast region, Seal Island and Matinicus Rock at the mouth of Penobscot Bay, and Machias Seal Island and Petit Manan Island off the downeast coast provide habitat for more than 4,000 puffins each summer.