Currently viewing the category: "Ground Beetles"
What's That Bug? does not endorse extermination

Subject: What’s this?!
Location: New Market, Tennessee
April 23, 2017 8:02 am
Hello! I believe this to be a type of assassin bug but i’m hoping to confirm. It is the season of April, and found on the 22nd day.
Signature: Kevin Dame

False Bombardier Beetle

Dear Kevin,
This is not an Assassin Bug, nor any other true bug for that matter.  This is a False Bombardier Beetle, and according to BugGuide:  “Caution: These beetles have chemical defenses.”  In our opinion, the chemical defenses are more of an annoyance to humans than they are a threat.

What's That Bug? does not endorse extermination

Subject: Its BIG
Location: Fort Gibson, Oklahoma
April 15, 2017 1:30 am
I found this bug or beetle crawling in my bed. I first heard it, as I must have laid on it, and it started making a humming type noise which woke me. It was then it was on my arm crawling. I whisked it off onto my sheet and took snapshot. Then took it outside.
I want to see if you may identify it for me?
Signature: Not Important

Black Caterpillar Hunter

Dear Not Important,
This is a Black Caterpillar Hunter,
Calosoma sayi, and though they are not dangerous to humans, they do have powerful mandibles that could nip someone who tries to handle one.  According to BugGuide:  “Predatory on other insects, especially caterpillars.”

What's That Bug? does not endorse extermination

Subject: Bug Indentity
Location: Wichita, Ks
January 24, 2017 4:05 am
I found this in washer. My roommate has been issues with bugs. I just wondered what this was because I’ve never seen one before. Thanks!
Signature: Cherie

Bombardier Beetle

Hi Cherie,
This fascinating beetle is a Bombardier Beetle in the genus Brachinus. and according to BugGuide:  “Adults have chemical defenses, ejecting toxic, foul-smelling gases from their abdomen with a loud popping sound. The explosive brew is composed of hydrogen peroxide, hydroquinone, and catalytic enzymes.”

Bombardier Beetle

What's That Bug? does not endorse extermination

Subject: Carabus granulatus?
Location: Lat. 48.372 Long. 123.538
December 8, 2016 7:29 pm
Dear Bugman,
Once again, I have thoroughly enjoyed exploring your site. Thank you and your crew for the wonderful time I just had!!
I found this beetle overwintering under an abandoned wasp nest attached to a rafter in my potting shed. I didn’t mean to disturb it and it was pretty groggy being woken up. it’s about 3/4″ long excluding the antennae.
I thought it was some sort of long-horn so I spent quite a while looking at them.
Anyway if it is an introduced insect, is it a problem? If it likes to eat earthworms that’s fine, we have lots!
Thanks again!
Best regards,
Signature: Sue

Ground Beetle

Ground Beetle

Dear Sue,
If we have calculated your global coordinates correctly, you found this Ground Beetle on Vancouver Island.  Please confirm.  We believe you are correct that this is a Granulated Carabid, and we do not believe it poses a threat to any local species despite it being an Old World species.

Hi Daniel,
Thank you so much for your reply!
Yes you are correct. The location is southern Vancouver Island, Metchosin specifically, William Head Road.
Thank you also, for letting me know it is not a threat to the local ecosystem. I do really enjoy discovering insects and learning about them.
Haha! I’m not a great fan of the flea beetle though. They all like my brassica way too much!
I was pretty amazed when I saw this one. I think it’s a Rhyssa persuasoria. Holy cow!! Some bug!!! Not a very good picture though.
Cheers, Sue

What's That Bug? does not endorse extermination

Subject: Insect Identification
Location: Oklahoma, USA
September 24, 2016 11:51 pm
My son has these in his garden. What are they?
Signature: BPWO

Larva of a Caterpillar Hunter

Larva of a Caterpillar Hunter

Dear BPWO,
This is the larva of a Caterpillar Hunter, a Ground Beetle in the genus
Calosoma.  Many times immature insects have a different diet than the adults, but not so with the Caterpillar Hunters.  Both larvae and adults ravenously feed on Caterpillars.

What's That Bug? does not endorse extermination

Subject: Nice Black Beetle
Location: Anchorage, Alaska
August 26, 2016 5:29 pm
I’ve lived in Alaska for 2 years and I’m not well acquainted with the insects here. I caught this guy ambling around in my garage. I took a photo and set it outside. What kind of beetle is this?
Signature: Sara

Ground Beetle

Ground Beetle

Dear Sara,
This is a beneficial, predatory Ground Beetle in the family Carabidae.  There are many similar looking species found in Alaska on the Carabidae of the World site, and we are not certain of your species.

Update:  November 5, 2016
We just received a comment that this is in the genus
Pterostichus, and we have linked to the genus on BugGuide.

What's That Bug? does not endorse extermination