May 2020 Natural Mystery

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Our May Natural Mystery comes to us from the shores of Picnic Island, overlooking the Minnesota River. The photo was taken this past weekend. The question is "who?" For a bonus, explain the blue-green color of the eggs and why it appears so dark here.

An ideal answer will identify the animal to species, explain the coloration, explain how you arrived at your answer, and explain how you eliminated other species whose eggs may look identical. Sharing these details will help others benefit from your process.

Answers are due by May 31.

Who and why this color? *

Name *

email address *

If your answer is selected, do you want your name posted along with the answer online or would you prefer for it to be anonymous? *

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This form was created inside of University of Minnesota Twin Cities.