Donald M. Jones / Long-tailed Ground Squirrel (Spermophilus undulatus) on alert, central Alaska

Donald M. Jones / Long-tailed Ground Squirrel (Spermophilus undulatus) browsing, central Alaska

Alfred Trunk/ BIA / European Ground Squirrel (Spermophilus citellus) carrying nesting material, Austria

Ingo Arndt / European souslik {Spermophilus citellus} young at burrow, Germany

Ingo Arndt / European souslik {Spermophilus citellus} young at burrow, Germany

Alfred Trunk/ BIA / European Ground Squirrel (Spermophilus citellus) mother and young playing, Austria

Ingo Arndt / European Ground Squirrel (Spermophilus citellus) giving alarm call, Lake Neusiedl, Austria

Cyril Ruoso / Tien Shan Ground Squirrel (Spermophilus relictus) eating grasses, Kyrgyzstan

Bence Mate / Group of European souslik (Spermophilus citellus) standing alert, Pusztaszer, Kiskunsagi National Park, Hungary

Konrad Wothe / Spotted souslik / Speckled ground squirrel (Spermophilus suslicus) standing alert, Bulgaria, May

Pete Oxford / Long-tailed Ground Squirrel (Spermophilus undulatus) on lookout, Mongolia

Robin Chittenden / European souslik or Ground squirrel (Spermophilus citellus) Dobrogea, Romania, May