These insects are small--about 1/8" long. I should be grateful they went after only one of my irises. I'd appreciate an ID and a suggestion as to what, if anything, I should do about them. Thanks!
They are amorous iris weevils. Kill them all.
Here is a link that might be useful: Iris weevil
Beautiful close-up of the petal, however. I hope you get all the little nasties!