Yesterday, in the midst of a flurry of activity at the feeder, with visits from a large flock of goldfinches, several male indigo buntings, rose-breasted grosbeaks, Baltimore orioles, and several woodpeckers, I observed a new behavior in a white-breasted nuthatch. The nuthatch was at the tube feeder, and suddenly spread its wings and rotated its entire body about 120 degrees like a pendulum. It then swung upright, and did the same maneuver in the opposite direction, wings widespread. Mating displays of birds of paradise came to mind immediately. This was the only nuthatch in the near vicinity. Thoughts on what was going on?
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