Sandy, they're probably still fueling up for the journey north to your place.
Tonight I tried to get a shot of as many as I could, but they move in and out so fast! There are seven showing here (the dark shadow behind the feeder is another one) and outside of the frame, five on the the pea fence right next to it, and several more flying about...and this, their favorite feeder, is all but empty...again!
Has anyone tried growing long beans in containers? I have some going that way, too, but I'm betting they'll fuss about the space issue...either that, or I'll never be able to supply water fast enough.