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Attention hunters: Visit our FAQ page for information about the use of centerfire, single-shot rifles for deer hunting in Illinois. 

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

Illinois' Natural History 101

Illinois Aquatics 101

​Illinois Aquatics 101 - Part 1
​Illinois Aquatics 101 - Part 2
​Illinois Aquatics 101 - Species Names

Illinois Geology 101

written by Mike Phillips, Illinois Valley Community College, Oglesby, Illinois

​Illinois Geology 101 - Parts 1 and 2
​Illinois Geology 101 - Parts 3 and 4
​Illinois Geology 101 - Parts 5 and 6
Illinois Geology 101 - Parts 7 and 8
Illinois Geology 101 - Parts 9 and 10
​Illinois Geology 101 - Parts 11 and 12
​Illinois Geology 101 - Parts 13 to 15

Introduction to Illinois Natural Resources

Introduction to Illinois Natural Resources - Parts 1 and 2
​Introduction to Illinois Natural Resources - Parts 3 and 4
​Introduction to Illinois Natural Resources - Parts 5 and 6
​Introduction to Illinois Natural Resources - Part 7
Introduction to Illinois Natural Resources - Part 8
Introduction to Illinois Natural Resources - Part 9
​Introduction to Illinois Natural Resources - Parts 10 and 11
Introduction to Illinois Natural Resources - Parts 12 and 13
Introduction to Illinois Natural Resources - Parts 14 and 15

Illinois Prairies 101

by William McClain, formerly of the Illinois Department of Natural Resources

​Illinois Prairies 101 - Part 1
Illinois Prairies 101 - Part 2
Illinois Prairies 101 - Species List

Illinois Woodlands 101

by Dr. John Ebinger, formerly of Eastern Illinois University, Charleston, Illinois

Illinois ​Woodlands 101 - Part 1
Illinois ​Woodlands 101 - Part 2
Illinois ​Woodlands 101 - Part 3
Illinois ​Woodlands 101 - Part 4
Illinois ​Woodlands 101 - Part 5
Illinois ​Woodlands 101 - Part 6
Illinois ​Woodlands 101 - Part 7
Illinois ​Woodlands 101 - Part 8
Illinois ​Woodlands 101 - Part 9
Illinois ​Woodlands 101 - Part 10
Illinois ​Woodlands 101 - Part 11
Illinois ​Woodlands 101 - Part 12