I know they must see me because it is too early for the sun's reflection to hide the room. There is a lamp over my shoulder which has to open that part of the room to some glow and reveal my movements. They twitter almost timidly as only the Blue Bird can and then they thrust themselves at the windows for about ten minutes. Their tapping against the window sounds careless as if they have tripped on their way somewhere and have to catch their balance.
I recently moved the potted geranium to protect it more from the hot summer sun and the Blue Bird appeared almost immediately to eat the bugs that I had exposed.
Lately, they have moved to the front of my house and do the same window pane "thrust and parry" there. I have recently discovered that they have a nest in a box on the post below the deck and at the side of the patio below. Not sure how they will have energy left to raise young ones since they seem to be constantly fighting with their imaginary neighbors. It is well into June and this will probably be a second nest for experienced parents, or a first if they are new to the routine this year.
Hubby says they are defending their territory and seeing reflections of themselves in the windows around the house and I am sure he is correct. I am startled some mornings when I go to make coffee and find both of them peering in from the kitchen windowsill only inches from my nose until I flick on the light and they fly away.