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Lehua Island is a small, crescent-shaped island in the Hawaiian islands, only north of Niihau, due west of Kauai. The uninhabited, barren island is a tuff cone which is part of the extinct Niihau volcano. Lehua was one of the first five islands sighted by Captain James Cook in 1778 which he spelled as "Oreehoua". Lehua Island is a Hawaii State Seabird Sanctuary. As a sanctuary, many activities are prohibited on the island, but entry is not prohibited. Lehua provides habitat for at least 16 species of seabirds, as well as some non-native rats and European Rabbits. When weather and wave conditions permit crossings from Kauai, Lehua is a noted destination for snorkeling and scuba diving. It is also well known for an unusual geological formation dubbed "the keyhole". Located in one of the crescent's narrow arms, this is a tall, thin notch cut from one side, all the way through to the other side of the arm. The United States Coast Guard maintains Lehua Rock Light (a lighthouse) on Kaunuakalā, at the highest point of the island. ==References== * Hawaii Department of Land and Natural Resources. (30 March 1981). (Rules Regulating Wildlife Sanctuaries ) (PDF). In, ''Hawaii Administrative Rules'', § 13-125. * Hawaiian Volcano Observatory. (29 September 1995). ("Oahu, Niihau, and Kauai" ). ''Volcano Watch''. * * (Lehua Island Ecosystem Restoration Project ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lehua」の詳細全文を読む スポンサード リンク
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