NO!!!! I was apparently wrong!

They didn't swarm, they didn't abscond...I sent the pictures to Matt at BeeThinking and he says I have a healthy hive preparing for winter.
I forgot that all the drones die so the population should have decreased.
All is well.....yay

Absconded a second time

My bees are nearly all gone again. I went to the hive yesterday to put the bottom board in, nothing flying about, opened a window and nearly empty of bees. I doubt they split and are developing a new queen, looks like she's absconded. The others will leave soon. In which case I will try to harvest the honey. Unless the reason they left is that they ran out of honey or were robbed by yellow jackets or other bees.

Not sure why. Maybe I should have fed them but it seems silly to have to "feed" wild insects with artificial sugar/syrup.....