Last year I showed you even thicker swarms of box elder bugs, but this year I have close-ups! And video! Note that last year's photos were taken in the first week of October. Having had several unseasonably early weeks of cool or cold, wet, overcast days, last weekend was the first real opportunity this fall for these guys to seek out warm, sunny, south-facing, light-colored walls. It seems they swarm on sunny days after the first cold weather of the season, looking for a place to overwinter. I don't know where they all end up -- a few end up inside the house, but not many.