Wilderness Landscape & Natural Heritage
Kawai Nui Marsh, located on the windward side of Oahu in Kailua, is the largest remaining freshwater wetland in Hawaii, covering approximately 830 acres. This ecological treasure is home to several endangered Hawaiian waterbird species, including the Hawaiian stilt ('aeʻo), Hawaiian coot ('alae ke'oke'o), and the Hawaiian moorhen ('alae 'ula). The marsh's significant role as a natural flood-control basin makes it a vital feature for the surrounding communities. Historically, the area was integral to Hawaiian agriculture and aquaculture, with early inhabitants cultivating taro in the wetlands. Today, Kawai Nui Marsh is a designated Ramsar Wetland of International Importance because of its rich biodiversity and cultural heritage. Visitors can enjoy birdwatching from designated viewing points and learn about the cultural and natural history of the area through guided tours and educational programs.
