Rodents were quite common everywhere. These are Mongolian Gerbils (Meriones unguiculatus, german: Mongolische Rennratte, french: Gerbille de Mongolie). (1022k)
Here are the pictures of Mongolian Gerbil (Meriones unguiculatus) with links to the pages on which they appear, links to the full sized picture, and the description of the picture with links to the entry in iNaturalist (inaturalist.org)
All pictures are © Dr. Günther Eichhorn, unless otherwise noted.
Mongolia Nature
Dr. Günther Eichhorn Travel Website
Soaring website