Endangered Species
Midwest Region



Midwest Region State Map

The Midwest Region includes Illinois, Indiana, Iowa, Michigan, Minnesota, Missouri, Ohio and Wisconsin. Find a location near you


Endangered Species Program

Conserving and restoring threatened and endangered species and their ecosystems


Great Lake Restoration Initiative logo


Endangered, Threatened, Proposed, and Candidates in the Upper Midwest


cave crayfish, no common name (Cambarus aculabrum)

Status: Endangered, listed April 27, 1993


Habitat: Caves


Lead Region: 4


Region 3 Lead Office: ColumbiaES, Missouri Field Office


Range: Arkansas, Missouri


crayfish (Cambarus aculabrum) species profile


Illinois cave amphipod (Gammarus acherondytes)

Status: Endangered, listed September 3, 1998


Habitat: Cave streams


Lead Region: 3


Region 3 Lead Office: Rock Island, Illinois Field Office


Range: Illinois


Life history, ecology, and regulatory information

Fact Sheet
Questions and Answers about the Illinois Cave Amphipod



Illinois Cave Amphipod Recovery Plan

Recovery in Illinois

2006 S6 Grant Project - Non-lethal population monitoring of the Endangered Illinois Cave Amphipod Gammarus acherondytes




Midwest Endangered Species Home


Last updated: March 12, 2018