You can compare the rear legs of the arriver with the rear legs of the one departing. Continuous missions indeed, but has there been sufficient progress to suggest a new brood box be added?
Once the lid and feeder tray are removed, this is the first view. A box full of frames with so much honeycomb building activity, it literally overflows. They seek to fill the voids.
When one of the frames is removed for inspection, we get a better view of the results of so much activity.
Mrs. Pondero wants to find the queen, and make sure she is doing well. She also wants to see if most of the frames are being used, and make a decision about whether to add another brood box. So she removes and inspects each frame.
Even the son-in-law participated. He pulls a frame for inspection, and receives a tip from Mrs. Pondero. I'm getting quite skilled at using the camera's zoom capabilities. After all the inspection is complete, Mrs. Pondero decides to add the new brood box.
Mrs. Pondero uses smoke to encourage bees back into the hive. She doesn't want to harm anyone when placing the new box to the hive.