Aerial show this morning

There was an aerial show over our garden this morning.  It was like six mini-fighter jets doing an air show.  Sleek white and metallic blue bodies swooping back and forth chasing one another at high speed, too fast to catch on video.  Once in a while one of them would swoop to block the entrance of the nest box.  I suspect that’s a male Tree Swallow from last year defending his home and his territory.  Let the photos tell the story.

I told you to chase them out from our property.

I've already tried my best. What do you want from me?

Fine! Here they come again.

Let me guard the door then.