Why do honeybees sit out on the porch doing nothing? This is commonly called "bearding". This is not the kind of bee bearding that Wikipedia describes when people "wear" a swarm of bees as a beard. No, this is when they hang-out on the outside of the hive. Most sources say this is because they are hot or croweded in the hive. Take a look at the two photos below:
The top photo was taken June 25th when it was mid-70s F. The bottom one was taken July 10th when it was 99 F. What is the difference?
Both hives have the same ventilation. The hive on the right seems about the same. The hive on the left is bearding much more in the second photo. This started only after we harvested the honey last week from the live on the left. We took two full supers, left one that wasn't quite ready and added an empty one. Perhaps they are simply too crowded now? Perhaps there is some other explanation? Perhaps they are unemployed and don't have any jobs to do at the moment?
We don't know, we are only the humans trying trying to learn how to take care of these colonies. Maybe I'll add another super to the one on the left and see if that helps get them back to work.