A feeder I frequently take pictures at has been empty most of the winter due to a pine squirrel. Feeding the squirrel is not the problem, just the damage done by the squirrel in the proximity of the feeders. Recently the feeders were filled and the chickadees immediately returned. As did the squirrel. Within a few days I heard the distinct nuthatch call. I waited patiently and watched. Soon a red-breasted nuthatch zoomed in to a perch, paused, jumped to the feeder, grabbed a sunflower seed, and flew off. This sequence repeated over and over, affording a window of less than one second each time to snap a photo. The pic could be better but the morning light was not strong yet. The chickadees were more compliant.