How did the trip go? Did my trap work well or not very useful (no offense taken if the latter, I want to know how to improve it)?
I went back to where I saw the D. bicolor flight last week and found tons of founding chambers... all empty. A few of them a small black fly zoomed out. There were also this red queen-size fly lingering around the area. I tried to catch one but couldn't. Do these sound like queen predators?
Camponotus vicinus, Crematogaster 1, Crematogaster 2, Formica francoeuri, *, *, Myrmecocystus testaceus, Novomessor cockerelli, Pheidole hyatti, Pogonomyrmex californicus, Pogonomyrmex rugosus, Solenopsis invicta