Twin Cities Ecological Services Field Office

Midwest Region


Twin Cities Field Office

4101 American Boulevard East
Bloomington, MN 55425
Phone: 612-725-3548
Fax: 612-725-3609
TTY: 1-800-877-8339 (Federal Relay)




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Endangered Species in Minnesota

Winged Mapleleaf


Winged mapleleaf mussel.  Photo by USFWS; Phil Delphey

The winged mapleleaf is an endangered freshwater mussel found in the St. Croix River in Minnesota and Wisconsin, the Ouachita and Saline Rivers in Arkansas, and the Bourbeuse River in Missouri. The St. Croix River contains the only population known to be reproducing. Propagation efforts are progressing with hopes of restocking portions of the mapleleaf's historic range.


Conservation and Recovery

August 17, 2012: Releasing Captive-Reared Mussels into the Mississippi


Sept. 30, 2011: Gravid Winged Mapleleaf Mussels Collected and Sent to Genoa Fish Hatchery


Oct. 1, 2010: Winged Mapleleaf Propagation Update


2006: Winged Mapleleaf Highlights of the Interagency Mussel Coordination Team


Nov.14, 2003 News Release: Blue Catfish are the 'Missing Link' for One Mussel's Survival


General Information

Winged Mapleleaf Fact Sheet


Mussels of the St. Croix River


PDF Fact Sheet: Genoa National Fish Hatchery and Native Mussel Restoration


Regionwide information on listing, natural history, and recovery efforts




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Last updated: April 15, 2015