The grey squirrel was introduced into the UK in the 1870s from North America as an ornamental species to populate the grounds of stately homes. Introductions occurred until 1930. At this time the damage caused by the grey squirrel was recognised and it was made illegal to release a grey squirrel into the wild. Grey squirrels have rapidly spread and colonised much of mainland England with detriment to our wildlife, especially the native red squirrel, and tree species.

However, watching Grey squirrels is a pastime for many and despite their negative effect on native wildlife.