The grey squirrel was introduced from USA to approximately 30 sites in England and Wales between 1876 and 1929. It is common throughout England and Wales, south of Cumbria and locally in Scotland.
As its name implies, this species has a grey back and tail. The flanks are sometimes reddish. They have small ear tufts, which are often unnoticed.
It has a weight of 450 – 650 g.
Vegetation eaten by the grey squirrel includes acorns, beechmast, tree shoots, flowers, nuts; also fruits, roots and cereals. It also strips bark and eats sappy tissue beneath.
Occasionally it feeds on insects and birds’ eggs. It eats 40-80 g per day, caches surplus nuts, mast and cones in scattered sites 2-5 cm below soil or in tree hollows.