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Sciurus Linnaeus, 1758
This genus of squirrels contains 30 species found in temperate parts of America, Europe and Asia. They are sometimes referred to as "tree squirrels". The North American grey squirrel has invaded Europe and is threatening the European red squirrel (Sciurus vulgaris). Several other species have been considered to be minor pests, mainly when they deplete seeds of forest trees or as reservoirs of diseases.
The species of the genus Sciurus can be recognized by their bushy tails. They grow up to a body length of around 25 cm with the tail reaching almost the same length. The colour is red or grey.
Currently, the following species have been entered into the system: