This is one of our resident pair of Welcome Swallows.
They produced two chicks earlier this year, but I haven’t seen them for awhile. One chick disappeared pretty quickly after they fledged, and the other went missing a bit after. I suspect that both were predated by Kookaburras or something similar.
The adults look kind of young themselves, so we think that this was the “trial” brood. Oh well, better luck next time.
At least the adults are still around to squeak at us.