A chickadee and a tufted titmouse hang out on the steel wire we used to hand the bird feeder. The feeder, by the way, is about 15 feet above ground, on a pully. I have to pull it up and down to fill it.
It's on a PVC pole that supposedly the squirrels can't climb. So far I haven't seen them trying to get into the feeder, although I have noticed that the squirrels and turkeys both like the seeds that spill from the feeder.