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To the Beauty of Birds

The Upland Goose or Magellan Goose Chloephaga picta is a sheldduck/sheldgoose of the Anatidae family that includes the ducks and most duck-like waterfowl such as the geese and swans. It is indigenous to the southern part of South America.
Males have a white head and breast, whereas the females are brown with black-striped wings and yellow feet.
In Chapter VI of On the Origin of Species, author Charles Darwin noted that the Upland Goose has webbing between its toes that appeared to be "rudimentary in function, though not in structure", and concluded that this was a vestigial anatomical feature in this bird.

Upland Goose