Skip to main content

The IDNR headquarters at 1 Natural Resources Way in Springfield has experienced a power outage and tree damage throughout the grounds as a result of severe storms in the area. The agency expects to reopen the building to the public on Monday, June 15, 2026, though this could be subject to change. Check back here for an update before planning to visit the office in person.

Governor JB Pritzker Illinois.gov Contact IDNR DNR A to Z

Project T-106-R1

Project Title: Assessing the Status of Potential Illinois Endangered and Threatened Fish Species

Community and/or Species Focus: Fish

Goals/Objectives:

  1. Examine and summarize existing assessment and museum collections data on selected fish species
  2. Identify populations that are lacking current data and develop a sampling plan
  3. Assess the status of populations that are lacking in data
  4. Provide a population status update report to inform management decisions

Achievements:

  1. ​Museum collection searches resulted in 560 historical locality records for the target species
  2. The literature was reviewed in order to identify information gaps on certain species 
  3. Field surveys were conducted that resulted in finding four of the target species: longnose dace, lake chub, banded killifish, and rosyface shiner
  4. Data on all surveyed fish species were submitted to IDNR 

Post-Project Survey (if applicable): n/a

Project Period: 10/1/15 - 3/1/17

Principle Investigator(s): Phil Willink (Shedd Aquarium)

Final Report: T-106-R1​​