chipmunk : Idioms & Phrases
antelope chipmunk
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noun small ground squirrel of western United States
antelope squirrel; Citellus leucurus; whitetail antelope squirrel.
WordNet
eastern chipmunk
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noun small striped semiterrestrial eastern American squirrel with cheek pouches
Tamias striatus; ground squirrel; striped squirrel; hackee.