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Encyclopedia Dubuque


"Encyclopedia Dubuque is the online authority for all things Dubuque, written by the people who know the city best.”
Marshall Cohen—researcher and producer, CNN

Affiliated with the Local History Network of the State Historical Society of Iowa, and the Iowa Museum Association.


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BUTTERFLY. The condition of this species of mussel is considered troubled. Historically widespread but uncommon, the current condition is less widespread and uncommon. Adults are typically from 2.5 to 3 inches. The host fish for the young is the freshwater drum.