Keaoi Islet Seabird Sanctuary is a 2 acre islet located off the Kau Coast along Hawai'i Volcanoes National Park. The islet subsided 10 feet after the 1975 earthquake and is currently washed over by waves. Access is by permit only to protect the islet's flora and fauna. Keaoi Islet provides a habitat for seabirds and most commonly the Bulwer's Petrel ('Ou).

Source: Bishop Museum, Offshore Islet Project