minute brown scavenger beetle

minute brown scavenger beetle

6027   My name is Trevor. I live in Edmonton Alberta. We started noticing these bugs primarily on the floors of our two second floor bathrooms in our house which are on opposite sides of the second floor. They also frequent window sills in the bathrooms and the bedrooms adjacent to them. We don’t notice them particularly at a specific time of day.  They are all roughly 2-3mm in length. If I do not pick them up well when trying to they will open their wings and I have seen them fly about 2 feet away, I haven’t seen them fly any further than that personally but one of the window sills I have found them on is 4 feet high so I assume they are moderate flyers. These are the best photos I could take and enhance with a macro lens. To my googling they seem like they could be Ahasverus advena, but I am very much an amateur and would like an expert opinion.

This is not Ahasverus advena (foreign grain beetle), it looks more like a minute brown scavenger beetle (Coleoptera: Lathridiidae); see https://tinyurl.com/y7yhjz2v for an example. These are not pests that you need worry about. Ed Saugstad, retired entomologist; Sinks Grove, WV.