"The ecology of Henderson Island, a raised atoll near on the southern border of , still seems to be in its natural state. The birds include an endemic monotypic genus of flightless , an endemic species of , and endemic races of and . Its seabirds have not been adequately studied but are known to include a large population of the rare dark phase of the . The may be an endemic race with white feet. ... … it is now one of the few islands of its size in the warmer parts of the world still little affected by human activity, supporting a variety of endemic plants and animals and important seabird colonies in an area with few alternative sites."