filbs's picture


Hi I live in the countryside and at this time of year and for about a month before every night when it gets dark we get anything upto a dozen or so beetles,I think there ground beetles varying in size from half inch to a whopping an inch and a quarter.I dont think they do any harm but when I go into the lobby and kitchen in the dark they do make me jump sometimes.Is there any way I can stop them coming in at all.I have 2 photos I have uploaded,sorry not sure how to put them with this text..does anyone know for sure they are ground beetles. thank you...Allan



Jonathan's picture

Welcome to iSpot

One of your pictures is here:

It looks like a ground beetle to me, but there are some experts in iSpot who will be able to tell you more.

You can convert this into an observation that will appear on the home page by going to 'add an observation' (visible if you are logged in) and then filling in all the info you can. At the bottom of the page you will find your photos. Check the little boxes by the pictures you want to use and click 'Save' and that should be it.

There are more instructions, should you need them, at

University of Edinburgh and Biodiversity Observatory (OU)

gary.hilton's picture

Ground Beetles in the House

Hi, when we used to live out in the sticks we would have these things come in the house and there is was nothing we found to stop them. I just use to sweep them up and chuck them out. I did try insecticide one time it was really bad but it took so long to kill them and they just lay on their backs waving their legs in the air. I do not the same problem now i live in town - but i do hundreds of woodlice eating the carpet! That is the natural world for you. They are in fact beautiful creatures - you just do not want them in the house.

Gary Hilton

Leon D's picture


Hi Allan,

They're definitely ground beetles (Carabidae), it's difficult to tell from the photo but they look very much like Pterostichus madidus. It's a very common ground beetle. Out of interest, did any of them have red legs? If so this would be the sub-form of P. madidus.

The best way to tell would be to take a look under a hand lens or microscope, the plate behind the head (pronotum) is an excellent indicator to which species it is, also the wing cases (elytra) have striations (lines) along with puncture marks (or indentations - I can't remember the exact number). Martin Luff has released several excellent identification books on carabidae, if you were able to get a copy from a local library, this would definitely help you.

Hope this has been of help?