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Taxonomy:

Spermophilus adocetus (Add)
Spermophilus alashanicus (Add)
Spermophilus annulatus (Add)
Spermophilus armatus (Add)
Spermophilus beldingi (Add)
Spermophilus brevicauda (Add)
Spermophilus brunneus (Add)
Spermophilus canus (Add)
European souslik, Spermophilus citellus (Add)
Spermophilus columbianus (Add)
Spermophilus dauricus (Add)
Spermophilus elegans (Add)
Spermophilus erythrogenys (Add)
Spermophilus franklinii (Add)
Spermophilus fulvus (Add)
Spermophilus lateralis (Add)
Spermophilus madrensis (Add)
Spermophilus major (Add)
Spermophilus mexicanus (Add)
Spermophilus mohavensis (Add)
Spermophilus mollis (Add)
Spermophilus musicus (Add)
Spermophilus pallidicauda (Add)
Spermophilus parryii (Add)
Spermophilus perotensis (Add)
Spermophilus pygmaeus (Add)
Spermophilus ralli (Add)
Spermophilus relictus (Add)
Spermophilus richardsonii (Add)
Spermophilus saturatus (Add)
Spermophilus spilosoma (Add)
Speckled ground squirrel, Spermophilus suslicus (Add)
Spermophilus tereticaudus (Add)
Spermophilus townsendii (Add)
Spermophilus tridecemlineatus (Add)
Spermophilus undulatus (Add)
Spermophilus washingtoni (Add)
Spermophilus xanthoprymnus (Add)