A plateau pika (Ochotona curzoniae) forages by a lakeside on the Qinghai-Tibet plateau in Maizhokunggar County, southwest China's Tibet Autonomous Region, July 6, 2019. (Photos: Xinhua)

A plateau pika (Ochotona curzoniae) is pictured by a lakeside on the Qinghai-Tibet plateau in Maizhokunggar County, southwest China's Tibet Autonomous Region, July 6, 2019.

Two plateau pikas (Ochotona curzoniae) frolic by a lakeside on the Qinghai-Tibet plateau in Maizhokunggar County, southwest China's Tibet Autonomous Region, July 6, 2019.