These hummingbirds were interesting and fun to watch.  We don’t keep a feeder at our own house and rarely ever see them.  These two bickered over the feeder as if only one could feed at a time.  They were oblivious to my observations as they buzzed around my head and sounded very much like large insects in flight.  I had to fight the urge to duck, as I feared they were going to fly into my face.