Ben,
The day I build my first screen top board, I didn?t finish it until just before sundown. I placed it on one of the 2 hives I had then. We were talking and looking at the bees through the screen and a SHB landed on it, I killed it. Then another one landed and I kept killing them and killed around 100 of them by the time it got too dark to see them any more.
They definitely fly to the hive at night.
Jim Altmiller