November 2022 Natural Mystery
This month's Natural Mystery comes from just off the Axle von Bergen Trail in Ft. Snelling State Park. The question is "What is this sign?" An ideal answer will include a who, a how, and a why: identify the species that created this sign; describe the behavior; and explain the basic purpose of the behavior. For a bonus, identify the tree this sign appears on.

To download the photo or view it larger size, right click the image below.
Answers are due by December 4.
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What is this sign? *
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email address *
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