sentences:  The wetland is also a bird sanctuary, home to 30 species of waterfowl, shorebirds, and migratory ducks, including the "aukuu" (black-crowned night heron, "Nycticorax nycticorax hoactli") and the endangered "āeo" (Hawaiian stilt, "Himantopus mexicanus knudseni") and "alae kea" (Hawaiian coot, "Fulica alai").Kealia Pond was selected as a wildlife refuge in 1953, protecting an initial of land.The refuge joined the National Wildlife Refuge System in 1992.