The Grey Squirrel (Sciurus Carolinensis) is not native to the UK and was in fact
brought over from North America by the rich and wealthy and kept as domestic pets
and eventually introduced into the wild, no body can be certain exactly when this
happened but estimations are between 1875 and 1930, efforts were made to prevent
the Grey Squirrel from spreading, but this only had a temporary effect on numbers
and the Grey Squirrel now occupies most of mainland England and Wales.
The Grey Squirrel does not hibernate and has two breeding seasons per year the first
being February - March and the second June - July the litter size averages around
three, the young are sexually mature after about 8-10 months. With a life span of
8-9 years in the wild, Grey Squirrel populations can become quite large and in some
circumstances have a detrimental effect on other wild life.
There are a number of ways to control Grey Squirrels, trapping, shooting and the
use of warfarin (anti-coagulant) but environmental considerations have to be made
before the method of control can be chosen.