The New Zealand Stiff-tailed Duck was closely related to the Australian Blue-billed Duck (Oxyura australis) but its bones were about one tenth smaller than those of its Australian relative.
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The ash lagoons have provided a roost site for gulls, shorebirds and terns; while the seawall provides excellent views of the flocks of sea ducks such as Common Eider, Velvet Scoter, Red-breasted Merganser, Long-tailed Duck and Common Goldeneye.
The American Ornithologists' Union changed the official American English name of the duck Clangula hyemalis from Oldsquaw to the long-standing British name Long-tailed Duck, because of wildlife biologists' concerns about cooperation with Native Americans involved in conservation efforts, and for standardization.
Add to this, thousands of Common Eider and Long-tailed Duck, then you have one of the largest concentrations of wildfowl in Norway.