A robust, variably plumaged dark thrush with orange and buff markings and blotchy brown streaks. Juvenile has buff fringes to its feathers. The only medium-sized songbird within its range. Singles and pairs are fairly common endemic residents on islands within the Tristan group in the south Atlantic, but rare on Tristan da Cunha itself due to introduced rats. A generalist predator and scavenger occupying heath, tussock grassland, and shorelines. Gives a short high-pitched chipping “ttslit” and a simple wheezy song.