American Pikas are small members of the Lagomorph order which is the same order that includes rabbits. Contrary to their appearance, Pikas are not rodents. American Pikas live in rocky tundra habitats above the tree line where they forage and store vegetation to feed on through the long winter months. They live in highly social groups and give a variety of barking calls back and forth to other individuals.
If you watch Pikas long enough, you can learn the typical routes that they take from their foraging areas to the rocky crevices where they store their food. I watched this Pika for awhile before I picked a location to sit. Once I sat at the location for about 20 minutes they were completely adjusted to my presence and resumed their foraging activities.