Click on the link for the full rundown ... BMSBs are a species of Hemiptera (true bugs) that stink when squished - we have a number of native stinkbug species that can be moderately destructive when there's an infestation, but the BMSBs are an Asian invasive that are devastating fruit and vegetable crops, I thought it was only in the eastern USA, but they've spread very fast. Even more fun, like the Asian ladybugs but more stinkier, they like to come into people's houses for the winter.