RIVERHEAD, N.Y. (CBSNewYork/AP) РAuthorities say a dead humpback whale washed up near the east end of Fire Island.

A spokeswoman for the Riverhead Foundation for Marine Research & Preservation told Newsday  that the organization was making plans to do an on-scene necropsy.

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The whale was discovered Tuesday afternoon in an area not easily accessible. She says the necropsy has to be done on the scene at low tide.

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She says heavy equipment will be needed to pull the whale away from the surf on Wednesday. A thunderstorm is expected Wednesday afternoon.

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Humpacks are endangered.