Starbuck Island (or Volunteer Island) is an uninhabited coral island in the central Pacific, and is part of the Central Line Islands of Kiribati. The island boasts a large colony of sooty terns, estimated at 1.5 million pairs, together with Polynesian rats, feral cats, green turtles, and around fifteen other species of seabirds. There is no freshwater on the island, which is one of the drier atolls in the Line Island group.