One of the reasons I am forever behind in keeping this endeavor up to date is because I spend way too much time trying to actually identify the critters I've focused on. Sometimes this is quick and easy; other times, it's, well... like this. I know the predatory insect that just showed off its moth prey when it landed on a rhubarb leaf is a Robber Fly, a member of a ferocious group of dipteran hunters belonging to the Family Asilidae. I don't, however, know much more about it... or, to be more correct, I didn't know much about it until I decided to make a run at banishing ignorance. There are, it turns out, lots of Asilids, and they're rather complicated to key out. But this is what I do for fun, so I took a preliminary run at the species and came up with Efferia aestuans, which, according to information on the Cape May Wildlife Guide website, is "one of the commonest robber flies in the northeastern USA and often quite bold and approachable." The latter is certainly true; make the ID provisional.