Cowbirds are far down on my list of desirable birds. I think it will be a while before we have any blackbirds return though. Right now we have a tremendous number of juncos. There seem to be more than usual this year. There is also an abundance of goldfinches.
Other regular visitors include chickadees, tufted titmice, white breasted nuthatches, house finches, one red breasted nuthatch, 2 Carolina wrens, 4 mourning doves, 2 blue jays, and up to 3 pairs of Cardinals depending on how hard it is snowing at the time. One immature male rose breasted grosbeak made a 2 day appearance after the last heavy snowstorm as did a flock of bluebirds. There has been one song sparrow and 2 chipping sparrows, haven't seen either of those in a while.
There are fewer woodpeckers this year. Mostly Downy, a pair of Hairy, one red bellied and one Flicker.
I don't want to jinx myself, but there has been very little hawk activity. I would have thought they'd be getting desperate about now with the deep snow cover.