Mating on the mind?

I don’t know much about the mating rituals of tree swallows, actually, I don’t know anything, but I have seen their territorial disputes, complete with angry squawks and frantic dive-bombing. This doesn’t look anything like that, so I am going to assume these birds had mating on their minds. If anyone has information contrary to that, please share it via the comments. Whatever they were up to, it involved approaching, landing, flying away, and more of the same. Watching them was fascinating (Click on the first picture to scroll through the gallery).

Should this be R-rated? What do you think?

Spring is in the air, and lots of things are happening in the park.

Thanks for stopping by.
Carolyn aka Skip