White-headed Flightless Steamer Duck
The White-headed Flightless Steamer Duck or Chubut Steamer Duck (Tachyeres leucocephalus) is endemic to Argentina.
It is the most recently recognized species of steamer duck, being described only in 1981. This is because it is only found along a rather small and sparsely populated stretch of coast around the Golfo San Jorge in southern Chubut and northern Santa Cruz Provinces, and that steamer ducks in general look fairly similar in plumage.
Database entry includes a brief justification of why this species is near threatened
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article White-headed Flightless Steamer Duck