Cheeky Grey Squirrel!

So cheeky and was enjoying his acorn so much, he let me get quite close (sorry, this is not Wildlife Photography;I'm only snapping on my phone)!
The story of the Grey Squirrel, introduced from America, and out competing the native Red Squirrel, is well known. But why are they such good competitors? Yes, they are bigger and heavier tan red squirrels, and if competition were literally a fight, they would probably win.  In ecological terms, however, they are better adapted to survive in a certain environment than red squirrels. Red squirrels favour pine trees and their seeds for habitat and food almost exclusively. Whereas grey Squirrels have a more eclectic diet, can survive in mixed woodland with deciduous broad leaved trees, coming to the ground often to feed on a wider variety of nuts and seeds.  We all know what has happened. Grey squirrels have pushed red squirrels to the margins, to the north where there are more pine forests.  And the islands, like Isle of Man, or Brownsea Island, because one thing grey squirrels can't do is swim.