The journey is one of several dozen “spectacular migrations” — in the air and on land — that are chronicled in a new report by the Wildlife Conservation Society. But the report warns that these migrations are in peril.
“Long-distance migrations as a whole are rapidly disappearing,” said an author of the report, Keith Aune, a senior conservation scientist here in Montana for the wildlife group, which is based at the Bronx Zoo in New York.
http://www.nytimes.com/2011/12/20/science/moving-day-for-many-species-is-becoming-more-fraught.html?src=me&ref=science
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