About the NWRS
The National Wildlife Refuge System, within the U.S. Fish and Wildlife Service, manages a national network of lands and waters set aside to conserve America’s fish, wildlife, and plants.
Learn more about the NWRS
Iowa Pleistocene Snail
Considered a glacial relict species, it has survived only on these small areas where temperature, moisture and food are suitable.
Page Photo Credits All photos courtesy of USFWS unless otherwise noted.
Last Updated: Jun 13, 2012