A medium-sized dark moorhen restricted to the Tristan da Cunha islands. Similar to Common Moorhen, which is a vagrant to the Tristan group, but stouter, with a black neck and underparts, no white on the flanks, and mostly red legs blotched with yellow (not all yellow as in Common). Juvenile has yellow legs but is flightless. Native to Gough Island and introduced on Tristan Island. Fairly common but somewhat secretive on both islands, preferring tussock grass and thickets below 500 meters of elevation. Calls include an electric rapid “cher-cher-chuk” and a soft “ek” in contact.