species is only known from bones and was presumably driven extinct by visiting sealers and the rats they introduced.

A 1696 sighting by William de Vlaming of "four-footed animals" in the reeds of Amsterdam Island may have been of this duck, as there are no native land mammals on the island. No naturalist visited Amsterdam Island until 1874, by which time it was infested with rats from visiting ships, and the duck was extinct.

The

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