Okay, you guys know I'm a butterfly gardener and I'm always keen to know who is friend and who is foe. This guy is definitely foe as he has a Dainty Sulphur in his mouth!!!
I don't recall seeing these before, but there are a lot of them this year. Whatever they are, perhaps this is just a good year for them and I never noticed before now? They do fly very fast which explains why it was able to catch a Sulphur and why I couldn't step on it. So what is it?