Breeding pair of tree swallows has chosen our bird house!!

They were having sex all day, but every time I tried to focus on that my camera wouldn't focus. Hmmm, was that telling me something? But, really is it bird porn if all they do is go hole to hole?

 I thought this morning I would try again, but only found then pruning and checking out the nest box.

 I can't tell the difference between him and her?