Freshwater Mussels of the Mississippi River

Butterfly Mussel

Freshwater Mussels populate Mississippi River pools, adding biological diversity and complexity to the system's food web.

USFWS Freshwater Mussels of the Upper Mississippi

A Survey of Freshwater Mussel Aggregations on the Lower Chippewa River, Wisconsin, April 2004

By David Heath, Ronald Benjamin, Kenneth Von Ruden and Mark Endris
Wisconsin Department of Natural Resources
La Crosse, Wisconsin

A Survey of Freshwater Mussel Aggregations on the Lower Black River, Wisconsin, March 2004

By David Heath, Ronald Benjamin, Kenneth Von Ruden and Jeffery Janvrin
Wisconsin Department of Natural Resources
La Crosse, Wisconsin

GEOGRAPHIC DISTRIBUTION OF WINGED MAPLELEAF MUSSEL (QUADRULA FRAGOSA (CONRAD, 1835)) IN THE ST. CROIX RIVER, MINNESOTA AND WISCONSIN, January 2002

By David Heath
Wisconsin Department of Natural Resources
La Crosse, Wisconsin 54601

Mississippi River Pool 5 Incidental Take Permit Issued, 2005

Some of these mussels are now endangered due to various human and human-induced ecological processes occurring in the system, including changes which have occurred from dams, including water depth, velocity of currents, and water temperature.

Endangered Mussels


Freshwater mussels listed as state threatened or endangered include:
Last Revised: June 8, 2007