An interesting study from the BTO and Natural England suggests that grey squirrels aren't to blame for woodland bird declines. Nice to know, but not a great surprise really given that many (not all of course) woodland species are declining across Europe and there aren't grey squirrels elsewhere in Europe (apart from part of northern Italy).
It would be possible that woodland bird species decline for different reasons in different parts of Europe but that would make life rather tricky.
But whether or not grey squirrels cause problems for woodland birds - and you would have to ask whether red squirrels would have caused more or fewer problems if they were still around - the problem that is firmly laid at the door of the introduced non-native grey squirrel is the demise of our native red squirrel.
A love of the natural world demonstrates that a person is a cultured inhabitant of planet Earth.
They do get a bad press so this is good to know.
Although, on saying that, I still think 'bad words' when I see them. In Scotland we're still lucky enough to have good numbers of reds although not here in Ayrshire.
RSPB Ken Dee Marshes in Galloway is a brilliant place to see the reds. Loads of them and obviously up in the Higlands. We came across a grey in Garroch Glen nr Dalry in Galloway a while ago and reported it. ( "and reported it", how primary schoolish does that sound - I;m reporting you. lol) They are slowly moving this way, who knows what will happen. Should they be culled. If the evidence is showing that they are causing the demise of our navtive species well maybe they should. Would make good carrion. (here I go again) Goshawks would be delighted