I check it every day because there is always something new to see. The arrow on the right points to the main entrance. This has changed size over the summer. I'd posted before how occasionally they wove shade awnings over it several times. They've also arranged fallen leaves.
Lately they've closed the entrance pretty tight allowing only a single bee in and out at a time.
One morning I found a huge hole right next to the stump (just above the left arrow). Something had dug in one night. The hole was nearly 8" round with dirt everywhere. Probably a 'coon or fox went after larvae? Whatever, I filled it in and it's stayed closed.
Airways have come and gone. They are usually circular holes no more than a half-inch wide. They don't stay open more than a couple of days.
About 10 days ago this passage appeared. It's nearly 3" long and half as wide. It looks like a cartoon mouse hole with it's straight smooth sides and defined arch. I've never seen anything fly in or out, so it must be an air shaft. The shape sure is interesting, to say the least.
This time of year there are fewer blooms to feed them especially now that the agastache has gone to seed. There are still the salvias and the zins and eventually the native asters will bloom, but already I'm seeing fewer bees.
I hope this nest survives the winter. These gals have really been good garden nabes.