Well, the title is a slight exaggeration because I did find one Olive Arches on the siding by the back door. However, it was the first non rainy night since spring that both the light and bait traps were completely empty. The temperature must have dropped very quickly.
Just to add, I have started to update the “Moths of Calgary and Southern Alberta” gallery on my website at http://www.albertanaturephotography.com/mothsofcalgary.
I’ve added some new species and have started to replace a few of the photographs with what are, hopefully, slightly better images.