The red squirrel or Eurasian red squirrel is a species of tree squirrel in the genus ''Sciurus'' common throughout Eurasia. The red squirrel is an arboreal, omnivorous rodent.
In Great Britain, Italy and Ireland, numbers have decreased drastically in recent years. This decline is associated with the introduction by humans of the eastern grey squirrel from North America and habitat loss. Due to this, without conservation the species could be extirpated from Britain by 2030.