Endangered Species
Midwest Region



Map of Region 3 Minnesota Wisconsin Michigan

Connect With Us

Facebook icon


Flickr icon




Twitter icon


YouTube icon



Buy Duck Stamps icon Endangered Species Day icon

Great Lake Restoration Initiative logo

Winged Mapleleaf (Quadrula fragosa)

Status: Endangered

Winged Mapleleaf

Photo by USFWS


Status: Endangered, listed June 20, 1991


Habitat: Medium to large rivers in mud, sand, or gravel


Lead Region: 3


Region 3 Lead Office: Twin Cities Field Office


Range: Arkansas, Minnesota, Missouri, Oklahoma, Wisconsin


Listen to a podcast!

Find out about the winged mapleleaf mussel and its conservation from field biologist Phil Delphey.


Audio Clip




The winged mapleleaf is an endangered freshwater mussel. Once known to live in about 38 different rivers from Minnesota to Arkansas, it is now found in only 5 rivers: 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.


Natural History, Ecology, and Regulatory Information

Fact sheet


Species Profile


Mussels of the St. Croix River


Fact sheet: Upper Mississippi River Section 7 Consultation



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


Winged Mapleleaf Propagation Activities 2010 - Minnesota and Wisconsin (1.6 MB) 2011


St. Croix River Winged Mapleleaf Conservation Project - Final Report (614 KB) 2010

Spotlight Species Action Plan 10-page PDF


Host Fish Identification and Early Life Thermal Requirements for the Federal Endangered Winged Mapleleaf Mussel (2-page PDF Adobe PDF Icon)

Winged Mapleleaf Mussel Early Life History Investigations Conducted by the U.S. Department of the Interior in FY 2004 (24-page PDF Adobe PDF Icon)


Recovery Plan (pdf file; 359 pages)


Mussels Home

Midwest Endangered Species Home


Last updated: April 14, 2015