North American porcupine 
Northern palm squirrel 
Northern viscacha 
Ochre bush squirrel 
Olympic marmot 
Pallass Squirrel 
Paraxerus boehmi 
Patagonian mara 
Persian jird 
Plantain squirrel 
Prevost's squirrel 
Red bush squirrel 
Red giant flying squirrel 
Red squirrel 
Red-legged sun squirrel 
Red-rumped Agouti 
Red-tailed squirrel 
Richardson's ground squirrel 
Rock squirrel 
Round-tailed ground squirrel 
Ruwenzori Sun Squirrel 
Sand Rat 
Sherman's fox squirrel 
Siberian chipmunk