Hello! I live in KC Missouri in the suburbs and like so many people was ignorant to the house sparrow problem. In the last two years I have seen around 10 species of birds disappear from my area. I purchased a drst in August and it works like a charm but it does require patience. Have also had some success with homemade box trap that has a wire mesh portal and a modified swinging one-way gravity door.
Decoys definitely help, as well as Ritz crackers. Does anyone know when hs will start looking for nesting sites?