squirrel (any mammal of family Sciuridae); Japanese squirrel (Sciurus lis)
Sciuromorpha (suborder of rodents)
ground squirrel (esp. a ground squirrel of North America or Africa)
Hokkaido squirrel (subspecies of red squirrel, Sciurus vulgaris orientis)
chipmunk (esp. the Siberian chipmunk, Tamias sibiricus)
squirrel monkey (esp. the common squirrel monkey, Saimiri sciureus)
common squirrel monkey (Saimiri sciureus)
Japanese squirrel (Sciurus lis)
Taiwanese squirrel (subspecies of Pallas's squirrel, Callosciurus erythraeus thaiwanensis)
red squirrel (Sciurus vulgaris)
eastern chipmunk (Tamias striatus)
Central American squirrel monkey (Saimiri oerstedii)
Korean chipmunk (Tamias sibiricus barberi)
striped possum (Dactylopsila trivirgata)
ground squirrel (esp. the Daurian ground squirrel, Spermophilus dauricus)
black-capped squirrel monkey (Saimiri boliviensis)
Siberian chipmunk (Tamias sibiricus)
Tamias sibiricus lineatus (subspecies of Siberian chipmunk native to Hokkaido)