SHORT VERSION: I was concerned when I saw a medium honey super suddenly crowded with bees. It turns that’s nothing to worry about.
LONG VERSION: I have one colony this year that isn’t in sad shape and might make some honey that I can eventually steal. The average high temperature for July where I live was 15°C (59°F), and that’s mostly with rain and fog. Honey bees that can make honey under such conditions are miracles workers. Yet I noticed bees in this one hive showing up in the honey super about a week ago and then today, just now, I found this above the honey super:
That’s a view of the bees through a screen at the bottom of an empty moisture quilt, essentially a screened inner cover and ventilation rim. Anyway, the bees are crowded up over the top bars in the honey super, pushing themselves into the screen of the empty moisture quilt. That’s a full blown cluster of bees, not just a few hundred workers showing interest in a honey super.