i ain't getting into this one other than to say they are great photos and to recommend a David Attenborough video / dvd Squirrels: Are They Tough Enough? A good make of bird feeder to use is the yankee Droll ones - had them up for a year and they've not got into them yet

They are a bit expensive but have a lifetime guaruntee - even against squirrel attack. Mine squirrels (in non red area) all have names

and special hoppers for nuts!

and i'm not getting baited into other discussions!