I have had a Yellow-bellied Sapsucker that shows up every year for about three years now and hangs out for a month or so, pecking on an Ash tree in my yard. I can't say if it is the same bird or not. This year, I have had several Ruby-crowned Kinglets also. My wife and I have observed several times the kinglet flying close to the sapsucker and hovering or sitting on a limb watching it. I think the kinglet has learned that there will be a meal of sap and insects for it when the sapsucker is not around. Has anyone else observed or heard of this?