Scott- "You can see a literal LINE of bees flying back and forth toward the southwest.. not sure what is in that direction that they are after, but it looks like a freeway during rush hour with all the cars going 70 mph with bumper to bumper traffic.
I just love to stand or sit and watch the rush hour. The sun sets in the west and lights up the bees in our backyard. Magical!
I have a vent of some sort between the upper two boxes all the time, be it a notch in the inner cover and/or popsicle sticks between the supers.