Just goes to show really - If we leave our natural Predators alone, i.e. not persecuting them for our own reasons (not getting into that argument) nature will sort out the invasive species by itself.
It's becoming apparent that as an invasive species the Grey Squirrel is not equipped to dodge some of our "natural" Predator mealtimes! Where as the Red has evolved alongside these & is probably why it's so much smaller, quicker & lighter - In order to avoid "dinnertime".
Just thought most of us would find this interesting reading.