I have an English sparrow problem and wonder if all you bird watchers can offer ideas! I have one large round feeder, one smaller one and a tray feeder, all filled with black sunflower seeds. We can fill all 3 one day and 2-3 days later flocks of these English sparrows have cleaned them out!! Even my cardinals get shortchanged and I don't see many of the other small birds now, e.g. chickadees, tufted titmouse, rosy finches, junco, golden finch etc. I've seen an idea on some bird watching lists of putting a circle of wire on the top of the feeder, with wires hanging down...supposedly the Eng sparrows don't like to go around them but the other birds will. TIA!