Niihau

Niʻihau or Niihau is the seventh largest of the inhabited Hawaiian Islands in the U.S. state of Hawaiʻi, having an area of 69.5 square miles . Niʻihau lies 17.5 miles southwest of Kauaʻi across the Kaulakahi Channel. Several intermittent playa lakes provide wetland habitats for the Hawaiian Coot, the Black-winged Stilt, and the Hawaiian Duck. The island is designated as critical habitat for Brighamia insignis, an endemic and endangered species of Hawaiian lobelioid.