Or, you could try a bucket trap. Fill a 5 gallon bucket 1/3 full with water, then cover the surface of the water with sunflower seeds (in the shell, they float), provide an access ramp. They jump in, and don't jump out. I set it at night and remove it in the morning before I let the birds out (chickens like sunflower seeds too). It worked really well for me, and you don't have to buy a bunch of traps and keep resetting them. Good luck!