The Lake Clark area is special because it has a large diversity of flowers, plants, trees, and lichen in a small area: a microcosm of Alaska. Four of the five biotic communities found in Alaska exist in Lake Clark National Park and Preserve. These communities are, the coastal, lakes/rivers/wetlands, tundra, and forest communities.
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.