Paper Sculpture by Allen and Patti Eckman. For more information on their fascinating art visit their website at http://www.eckmanfineart.com/
An article about this particular piece can be found at http://www.southdakotamagazine.com/?p=1010
On display at Prairie Edge in downtown Rapid City. It won't be there long however as it is awaiting transport: It was purchased by a private party for $72,000.
I regret the lack of scale in this image: The sculpture is approximately 8 feet long.