Rarest of whales washes up in NZ_美文_趣味英语-查字典英语网

Rarest of whales washes up in NZ

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The spade-toothed beaked whale is so rare that nobody has seen one alive, but scientists have proof the species still exists.

Two skeletons were identified as belonging to the species after a 5.2-meter whale and her calf beached themselves in New Zealand in 2010. Scientists hope the discovery will provide insights into both the species and ocean ecosystems.

It was almost a missed opportunity, however, since conservationists misidentified the carcasses as a much more common type of whale and buried them.

In a paper published on Tuesday in the journal Current Biology, researchers from New Zealand and the United States said of their discovery: "For the first time we have a description of the world's rarest and perhaps most enigmatic marine mammal."

Previously only three skull fragments of the species had been found - in New Zealand in 1872 and the 1950s, and the last one 26 years ago on an island off Chile. The males have broad, bladelike, tusk teeth that give the species its name. Both males and females have beaks that make them resemble dolphins.

"This is pretty fantastic," said Ewan Fordyce, a geology professor at the University of Otago who specializes in the evolution of whales but who was not involved in the research. "There would be few, if any, mammalian species in the world that would be rarer. And we know much more about panda bears and other iconic, rare animals."