Pika Peering from Moss (image) University of Utah Caption A small mammal known as a pika peers out from thick moss in Oregon's Columbia River Gorge. A University of Utah study found the pikas survive warmer low elevations in Oregon by eating a diet of 60 percent moss, compared with their grassier diet at high elevations. Credit Jo Varner, University of Utah. Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.