They make the red-shouldered hawks (Buteo lineatus) go into courting mode. The hawks are easy to spot because they’re anything but quiet about it, as indicated by the open mouths.
I’m fairly certain the perched one here is the same female I’ve photographed in the past couple of years (her belly, seen in shots not good enough to keep this time, is distinctively red overall,) but the flying male appears new. No signs of the nest yet, but I’ma keep lookin’.
That’s all.