Guided by the U.S. Fish and Wildlife Service's strong wildlife conservation ethic, the Refuge is primarily responsible for monitoring the health of most of the Pacific's subtropical seabird population and wildlife habitat. Providing a safe haven for 22 nesting seabird species, millions of seabirds arrive seasonally to breed, nest and rear their young. In addition, the Service is responsible for the well-being of all native birds and plant species, some that live nowhere else on the planet and whose genetically linked ancestors have long become extinct. Much of the staff’s efforts also support the work of the National Marine Fisheries Service by monitoring breeding habitat to increase chances of reproductive success for most of Hawai‘i‘s green sea turtle population as well as the critically endangered Hawaiian monk seal.