Location: Portland, Oregon
September 20, 2011 9:16 pm
We have have dozens of this kind of bug come into our house this past summer because we have been leaving our door open. We think they might have a nest nearby but we can’t figure out what they are. I looked at many different wasp- like bugs but didn’t find anything that looks like it. It makes a loud buzzing sound and is about 1 inch long.
Do you or does a neighbor have a nearby compost pile? This is a Black Soldier Fly and the larvae live in compost and similar habitats where they are considered beneficial since they compete with the maggots of House Flies for food. Though they look like wasps, they do not sting or bite and they are perfectly harmless. Because of the clear areas on the abdomen, the Black Soldier Fly is sometimes called a Window Fly. See BugGuide for additional information. If you do have a compost pile in the yard, you may be interested in the Black Soldier Fly Blog.