Gray-footed chipmunks are shy and more often heard than seen. They make light "chipper" or low "chuck-chuck-chuck" calls, and when they sense danger, they scurry into deep brush, underground, or up a tree. Learn more about the Tamias canipes, more commonly known as a Gray-footed Chipmunk, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.