I've heard of them, but never seen them-I don't think. At least I know what to look for now.
Aha! That's the culprit! Great shot- I never would have imagined that's what they grow up to be.
Looks kind of innocent to be such a baddie. Great shot!
actually, that looks more like a yellow soldier beetle than an iris borer (a moth).
Yeah, that's not the borer. The borer is a moth.
Here is a link that might be useful: Iris Borer Adult Moth Images
just a bit of humor - moths are moths and borers are borers