American pika (Ochotona princeps) calling, San Juan National Forest, Colorado, United States of America, North America

American pika (Ochotona princeps), Peter Lougheed Provincial Park, Kananaskis Country, Alberta, Canada, North America

American pika (Ochotona princeps), San Juan National Forest, Colorado, United States of America, North America

American pika (Ochotona princeps), San Juan National Forest, Colorado, United States of America, North America

Collared pika (Ochotona collaris) taking food to a cache, Hatcher Pass, Alaska, United States of America, North America

Collared pika (Ochotona collaris), Hatcher Pass, Alaska, United States of America, North America

American pika (Ochotona princeps), Mount Evans, Arapaho-Roosevelt National Forest, Colorado, United States of America, North America

American pika (Ochotona princeps) eating grass, San Juan National Forest, Colorado, United States of America, North America

American Pika (Ochotona princeps), San Juan National Forest, Colorado, United States of America, North America

American pika (Ochotona princeps), Shoshone National Forest, Wyoming, United States of America, North America

American pika (Ochotona princeps), San Juan National Forest, Colorado, United States of America, North America

American pika (Ochotona princeps) with food in its mouth, San Juan National Forest, Colorado, United States of America, North America

American pika (Ochotona princeps) with food, Jasper National Park, Alberta, Canada, North America

American pika (Ochotona princeps), Peter Lougheed Provincial Park, Kananaskis Country, Alberta, Canada, North America

American pika (Ochotona princeps), San Juan National Forest, Colorado, United States of America, North America

American pika (Ochotona princeps) among yellow wildflowers, San Juan National Forest, Colorado, United States of America, North America

Collared pika (Ochotona collaris), Hatcher Pass, Alaska, United States of America, North America

Collared Pika (Ochotona collaris) taking food to a cache, Hatcher Pass, Alaska, United States of America, North America

American Pika (Ochotona princeps), Yellowstone National Park, Wyoming, United States of America, North America

American pika (Ochotona princeps), Mount Evans, Colorado, United States of America, North America

American pika (Ochotona princeps) eating, Yellowstone National Park, Wyoming, United States of America, North America

A Pika peeks his nose out of his hole near Tso Moriri in the remote region of Ladalkh, north India, Asia

American pika (Ochotona princeps), Shoshone National Forest, Wyoming, United States of America, North America

American Pika (Ochotona princeps), Uncompahgre National Forest, Colorado, United States of America, North America

Pika (Ochotona) standing among boulders and on large rocks, Denali National Park, Alaska, USA, North America

Close-up portrait of a collared pika (Ochotona collaris) pausing on a boulder in mid-August with a hank of wild grass in its mouth in Southcentral Alaska's Hatcher Pass in the Talkeetna Mountains north of Palmer, Alaska, United States of America

A collared pika (Ochotona collaris) pausing on the alpine tundra at Southcentral Alaska's Hatcher Pass, high in the Talkeetna Mountains north of Palmer in late August, Alaska, United States of America

A Collared Pika (Ochotona collaris) gathers food to put in small haystacks to dry and which will provide him with food for the cold and snowy winter months. Pikas do not hibernate. Hatcher Pass area near Palmer, South-central Alaska; Alaska, United States of America

A Collared Pika (Ochotona collaris) sounds an alarm to nearby Pikas to alert them to a possible danger or to simply communicate with others. Pikas do not hibernate and are actually small members of the rabbit family. Hatcher Pass area near Palmer, Alaska in South-central Alaska, late summer; Alaska, United States of America

Collared Pika on rock, Denali NP Alaska

Collared Pika on rock, Denali NP Alaska