We try to keep the feeders stocked up for the hummingbirds.  However, while there is never a shortage, they still get very competitive about access with dominant birds trying to keep the others away.  If only they understood!  As the temperature dropped and I imagine their food sources got sparser, one of the hummers decided to take up residence on the arm that the feeder hangs from.  If I went outside, it would fly away but would immediately return as soon as I was gone.  It meant it was easier photographing it through the window.  The icicle hanging beneath it is a measure of the chilly conditions.