For the past month or so, we've had a Northern Mockingbird visiting our yard and our feeders. At first, he (let's call it a "he" for now) would come and check out the heated bird bath and maybe take a sip or two.
Then, he started picking at the seed I threw on the porch. Lately, he's taken to standing guard over the suet feeder. He seems to let the Downy and Red-bellied Woodpeckers have their share, but when a Starling comes by, all hell breaks loose. He seems to know that they're not wanted and swiftly dispatches of them. Even if he's not visible, he seems to materialize when the Starlings appear.
I've decided to name the mockingbird "Michael Winslow" due to his mastery of mimicry. I hope he sticks around and raises a family in our neighborhood.