The Answer is: BROWN MARMORATED STINK BUG
what’s up what’s that bug?
I enjoy the site which I stumbled upon in trying to help my nephew learn more about his favorite past time, looking at bugs. Nonetheless I know think I have an appropriate question with which I need help. A few weeks ago, as the night temperatures began to dip into the 30’s (Fahrenheit), I removed the air-conditioner from my apartment window. Falling from the unit’s crevasses were tens of these bugs, which I have never seen before. This specific window faces the NNW and gets no direct sunlight as well there a number of tress about 30 feet away from my 4 th story, multi-dwelling apartment building in the heart of Georgetown, Washington DC. The pictures a crude, but can you identify these creatures? To be honest I am not typically ‘grossed-out’ by a bug or two, however the quantity here (as shown in one photo) and the proximity of my hands, arms and bare feet to tens of falling, semi-lifeless bugs was odd… Hope all is well. Thanks!
Your home is being invaded by Stink Bugs in the family Pentatomidae. Many True Bugs, including Stink Bugs, Western Conifer Seed Bugs and Boxelder Bugs, invade homes to excape the cold of winter. Your photo does not have enough detail to get an exact species identification, but there are individuals in several genera pictured on BugGuide that look very close. These include Apateticus, Banasa, Euschistus, Menecles, and the predatory Spined Soldier Bug in the genus Podisus.
Update: from Eric Eaton (11/28/2007)
I have the unfortunate answer to the “stink bug home invasion.” The species in the image is the recently introduced “brown marmorated stink bug,” Halyomorpha halys. It is well known for its habit of congregating on, or in, homes to overwinter, in contrast to our native stink bug species. So far, Halyomorpha halys is known mostly from Pennsylvania and adjacent states (and District of Columbia, obviously), but other populations have turned up in Oregon and elsewhere. It is a good idea for anyone with invading stink bugs to alert their state department of agriculture to positively identify the offending insects.