The only thing that my black-chins will not mess with are wasps. I think they might have learned that lesson the hard way. They attack everything else near the feeder.
Well, except for me. They know I am The Bringer of Good Stuff. If I take a feeder inside to clean and refill it, they'll hover where it's supposed to be, looking confused. Then, when I bring it out all freshly filled, they swoop right in immediately, almost before I can let go of it.
