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How are marmots related to squirrels?

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Do squirrels forget where they hide their food? — squirrel Overview of food-burying behaviour in squirrels.

Marmots are closely related to squirrels as they both belong to the same biological family, Sciuridae, within the order Rodentia.12

Specifically, marmots are classified as a genus (Marmota) of giant ground squirrels. Within this family, the closest living relatives to marmots are other ground squirrels and prairie dogs. While tree squirrels are the members of the family most commonly associated with the name "squirrel," marmots share the same evolutionary lineage as these smaller, arboreal relatives.12