To me it's the Amsterdam Wigeon of Île Amsterdam. Somehow a very small bird finds itself on an extremely small island thousands of miles in the middle of the Indian Ocean, not to be found anywhere else, and out of the blue sailors show up and eat them all to death. Not only that, but there used to be groves on that island, which were burned away and replaced with grass for cattle grazing. It makes me sad what a number people do on the environment. There's no pictures of the animal and it's only known from bones.