Formerly called the Catherine Archipelago, the Aleutian Islands comprise some 150 mostly volcanic islands extending twelve thousand miles west of the Alaskan Peninsula. Attu Island is the islands are covered with a luxuriant, dense growth of herbage, including grasses, sedges, and many flowering plants. But the Aleutians are best know for their wildlife. More than 10 million birds nest on the islands, and visitors can see puffins, tufted ducks, harbor seals, sea otter and reindeer, just to name a few.