These are the little blighters on the beans. There are heaps of little groups hanging out like this lot. I think they're sucking insects, the beans look a bit mishapen and the adult bugs which are lime green, stink. Will have to spray with Pyrethrum I think. I have talked to heaps of folk about them and havn't had any joy finding out what their predators might be. I can't imagine any bird enjoying their flavour, I didn't look at a raspberry that I poped in my mouth the other day, it must've had a stink bug on it and the gross taste was there for ages. Note to self, inspect organic veges before putting in mouth!