Hello! Daisy here in the Piedmont of North Carolina. I'm familiar with birds of prey, colorful birds such as Blue Jays, Cardinals, bluebirds woodpeckers, and of course my favorite, hummingbirds. I've recently moved out into the country and in swarmed by small brown birds which I believe to be house sparrows. I have multiple caged squirrel proof feeders and somehow, these little fellas, are getting inside the feeders?? I've released at least six today alone. The holes are tiny and I do not understand how they are getting in. They are also deterring the beautiful songbirds. Does anyone have any suggestions here?