(Portland, OR) -- The Oregon Zoo needs volunteers to help find a rare animal in the Columbia River Gorge. Pikas [[ PIKE'-uhz ]] are normally found at high elevations, but there's a population that live in the Gorge. They're small animals that look like a large mouse with a distinctive call that sounds like a squeak-toy. On May 8th, 9th, and 10th the zoo is offering training on how to spot them and record the location. This year they'll be searching for Pika in the eastern part of the Gorge. The Zoo's website has details on how to take part.