The grey squirrel builds nests known as dreys in the hollows of trees or if you’re unlucky, in the roof spaces of houses. The grey squirrel has two breeding seasons a year. The first litters are born in February/March time after a gestation period of 45 days. The 3-4 young are weaned at ten weeks old. A second litter is born in June/July time.
Grey squirrels eat a wide range of foods from nuts, fruit, young shoots to birds eggs and nestlings. Surplus food is buried for retrieval at a later date. The grey squirrel was deliberately introduced to Britain from the USA in 1876 spreading throughout England and Wales displacing the native red squirrel. As a non-native species it is illegal to trap and release grey squirrels to another area.