Update at my place.
Still no eggs or cats, though I have seen eggs being laid. First observation was a few days ago. Ran in to tell/show wife and by the time we returned - a matter of minutes - the egg had been pierced and sucked out.
Seeing adults every day for the past week to 10 days. Sporadic before that. This afternoon, I saw 4 at the same time. I don't know if it was males fighting over territory or romance ritual, but observed a lot of chasing.
OT - I am also seeing a ton of swallowtails. Many more than prior years. So far no eggs or cats for them either.