Tree squirrel

Tree squirrels include over a hundred species that are found on all continents except Antarctica, and are the members of the squirrel family (Sciuridae) most commonly referred to as "squirrels". They do not form a single natural, or monophyletic, group, but instead are related to the various other animals in the squirrel family. The defining characteristic that is used to determine which of the various species of Sciuridae are tree squirrels is therefore not so dependent on their physiology, but their habitat. Tree squirrels live mostly among trees, as opposed to other squirrels that live in burrows in the ground or among rocks. However, there is one exception to this rule, as physiological distinction does make a difference in regard to flying squirrels, who also make their home in trees, but have unique physical characteristics that separate them from their tree squirrel cousins (specifically, special flaps of skin that act as glider wings, allowing them to "fly"). For more information, visit the Wikipedia entry. Get back to Rodentia
Red squirrel	Eastern gray squirrel	American red squirrel	Pallas's squirrel

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