The island of Suwarrow was declared a National Park in 1978 for the protection and conservation of its terrestrial and marine flora and fauna. The island is a key biodiversity area and holds one of highest population of frigate birds and Red-Tailed Tropical bird. Whales and manta rays are known to visit the island and are occasionally been sighted in the Suwarrow lagoon. The National Environment Service is mandated to manage the island of Suwarrow and has rangers stationed on the island at certain times of the year. The rangers role is to protect and conserve the flora and fauna of the island of Suwarrow and monitor the visiting yachts to the island.