According to this, Carolina wrens frequently make use of snake skin in their nests, which appears to be present in this one.

Tom Bailey

St. Louis, MO

From: Missouri Wild Bird Forum [mailto:[log in to unmask]] On Behalf Of Kevin Wehner
Sent: Tuesday, July 11, 2017 12:46 PM
To: [log in to unmask]
Subject: No Sighting - Need Bird Egg ID

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Does anyone know what species laid these eggs? Thank you!
Kevin Wehner
[log in to unmask]<mailto:[log in to unmask]>
Columbia, MO


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