Late at night and in the early morning... There between 3/4 and 1 inch long. What are they? Do they sting/bite?
CLOSED: these are all over my deck
That looks like a 'stink bug'. They are a pest to crops, I've never been bitten or bothered by one, so I don't think they're very aggressive. They emit an odor from their abdomen that is a defense against predators and if you pick them up or irritate them that could cause them to smell too. According to Wikipedia the scientific name is Halyomorpha halys :)