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Possible online services disruption due to Internet related outage

A worldwide technology outage is causing disruption to some State of Illinois online systems.  We are aware of this issue and are diligently working on restoration.

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Natural Divisions

A common classification scheme used in Illinois, developed by John Schwegman and coworkers, recognizes fourteen Natural Divisions, plus Lake Michigan-- geographic regions having similar topography, soils, bedrock, plants, and animals. Natural Divisions are an important tool for recognizing biological variation across Illinois, and organizing regional needs, objectives and strategies of the Illinois Wildlife Action Plan. An overview of Natural Divisions Overview Nat. Divisionsis provided, as well as links to in depth descriptions of each Division below.