My bird feeders certainly get a lot of activity during the winter months.  We feed about 100 lbs of seed a month during that time.  One thing that always amazes me is that those coming to the feeder usually come in droves.  The squirrels were here in mass this morning. There were four of them who did not get included in the picture!  Soon the bluejays will come followed by the Cardinals.  Later in the day it is usually a very integrated group.