Any experience with GREY squirrels attacking nestlings?
I have never experienced myself, in many years of "gardening for birds", any raid by any squirrel of this species on egg clutches or nestlings. (I know that the red one is another story.) But of course this doesn't prove anything...
I want to put up my chickadee house (made of wood) again this spring. I have to consider a spot which happens to be near the house (quite easily accessible to the squirrels re. hedges and trees), which will be remote to where we have our leashed cat rest outside in the shade, in the warm season. (Otherwise, the chickadees make a terrible fuss, restrain from feeding their chicks as long as the cat is there, etc., and then it's no fun for anyone in the garden!)
If I should be forced to buy a metal box instead, do grey squirrels actually reach in with their forelegs to catch their prey? (as I would expect a raccoon would do)