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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.

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Winter in Illinois

Where do animals go in the winter?

Looking outside in winter, it is hard to imagine where all the animals of summer have gone. Some can still be seen. Others fly south for the winter. Still other, hunker down and wait it out, out of sight and out of mind.

What do animals do in the cold and how do they make it through the winter season. Explore all the amazing ways animals deal with snow, ice, and cold. 

Winter Webpages

A Word on Winter Living Strategies

Plants and Animals Facing Winter

Feeding Birds in Winter

The Subnivean Zone

Where Do They Go in Winter?

The Book Nook

Winter Climatology Maps

These maps were produced by Dr. Trent Ford, Illinois State Climatologist, for the 2025 Illinois State Fair. These maps show the comparisons of typical weather conditions from the past 100 years.

Average First Fall Freeze (32°F)

Average Total Season Snowfall (inches)

Average January Temperature (°F)