The cowbirds will empty a birdfeeder in a few hours, most of it kicked to the ground. The wife is visiting her mother so right know the kitchen table has a BRL .22, a BB gun and a smoothbore .22 that shoots bird shot (only good for 10 yards or so but if I can sneak the patio door open and get them aligned on the ground, I can get 2-3 per shot). They are lately hanging in the trees with nice birds so my open chocke 20 ga. is no good (I don't want collateral damage). You being in Minnesota and not having any is surprising (you aren't that far from here). Count your blessings.