sentences:  Invisible rail
  
  The invisible rail, Wallace's rail, or drummer rail ("Habroptila wallacii") is a large flightless rail that is endemic to the island of Halmahera in Northern Maluku, Indonesia, where it inhabits impenetrable sago swamps adjacent to forests.Its plumage is predominantly dark slate-grey, and the bare skin around its eyes, the long, thick bill, and the legs are all bright red.