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On August 18, 2020, the Xerces Society filed a petition to list the western ridged mussel as an endangered species under the U.S. Endangered Species Act. The western ridged mussel has been lost from 43% of its historic range. In addition, sudden die offs of western ridged mussels have been observed in Oregon and Washington.


Please view our press release on the topic here, and our blog on the topic here.

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