Because of its remote location, diversity among the terrestrial species is low. The archipelago has a huge variety in animals and more than 9,000 acres is a national park: National Park of American Samoa. The park stretches over three of the six islands in the archipelago: Tutuila, Ofu-Olosega and Ta‘ū. Eight mammal species have been recorded at American Samoa, of which none of them are critically endangered.