Well, any moron that thinks 80% of squirrel populations die off in the Winter, needs not to call himself an expert. What do these pinheads do, sit at a desk and run computer models, when he could learn a lot by being in the woods. And if he is talking about city or park squirrels, they live like kings. The worst thing I ever saw affect squirrels was the total mast failure we had after the cicadas a few years back.And I'd bet the farm they got no where close to 80%.