Pikasare the only vocalizing members of the rabbit order. Gathered here are several of their calls, recorded by S. Weber starting in the 2006 field season.
The American pika (Ochotona princeps) lives primarily above tree line on high boulder-strewn slopes. About the size of a large hamster, pikas make hay piles during the summer which they defend vigorously, and eat from during the long winter under the snow. Pika populations appear to be increasingly adversely affected due to global warming pressures.
More information about ongoing pika research is available through the Bristlecone Institute and selected publications.