The key for gardeners is to recognize the infants and juveniles of the stink bug, which will cluster together for some time before they mature. They can be black & white or grey, or other colors, and they look nothing like the adults. They are easier to kill when very young.
Gardeners should look them up and recognize all stages, in order to protect the bounty.
Yep The ones around here are mostly green but have seen the grayish to browns around also.
I usually don’t see them in numbers until Sept. or so, then they arrive and do damage to my tomatoes on the vine. Nasty holes in the fruit that at first I thought were caused by birds.
I was never like this until recently, but now I kill almost every bug I see. Mea culpa.