A tip about sunflower hearts changed my feeder game completely
I used to buy the mixed seed bags from the big box store because they were cheap. Put out a tube feeder and got mostly house sparrows and a few mourning doves picking up the scraps below. Then a lady at the local nature center in Des Moines told me I was basically feeding the birds I didn't want. She said switch to just black oil sunflower hearts and watch what shows up. I figured why not since it was only $12 for a decent bag. Within three days I had goldfinches, chickadees, and a pair of cardinals that never touched the old mix. Turns out the sparrows don't like the hearts as much and the cool birds do. Has anyone else noticed a big difference when they dropped the filler seeds?
Same thing happened here. Dropped the cheap mix two winters ago and never looked back. The filler seeds just end up on the ground rotting and pulling in rats. Sparrows will still show up but they thin out once the junk food is gone. Sunflower hearts cost more but you waste less so it kind of evens out.