Are green shield bugs harmless?

Hi there Tussiemussie, the RHS have an article saying they are harmless and dont need controlling. The link is http://www.rhs.org.uk/advice/profiles0900/green_shield_bug.asp

Thank you Joey, that is nice to know, I had some similar but brown squash bugs last year and they reduced my newly planted rhubarb leaves to skeletons,strange thing for them to eat they didn't touch the squash!

Oops just read the article and those I saw were uniformly green, might be that new southern one, which can be a pest. If I see any more non-natives I will pick them off and feed them to the ducks!

Ahhh, actually I am pretty partial to rhubarb myself so I dont blame them!