Hawks like that don't have that much effect on sparrows. They do catch them occasionally but they will completely bypass sparrows for a chance at pigeons or doves.
In fact, can't keep pigeons or doves here(because of the hawks)... can't keep sparrows AWAY..... many times there would be...
Yeah I believe you... seen it happen myself. Have dog kennel doing duty as chicken coop, covered it all over with chicken wire, including the door. Didn't stop them.. and they squeeze right through if I happen to corner them in there. I figure it makes it harder for them though as they...
They do work. Weird thing is, sometimes the traps can't be emptied fast enough. Other times there will be days of not even a single bird. Then a few birds will be in, and so on. I don't know what the cause of this inconsistency is(when the trap has been in same location the whole time)...