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

Subject: Beetle from Patagonian rain forest
Location: Cahuelmó, Parque Pumalín, Patagonia, Chile
March 8, 2014 3:06 pm
This very large beetle was found in temperate rain forest at Cahuelmó in the northern part of Parque Pumalín. Can you help putting a name on this species? We were told it’s supposed to be endangered, is that true?
Signature: Henriette

Chilean Stag Beetle

Chilean Stag Beetle

Dear Henriette,
We are so thrilled to have received your identification request and this excellent photo.  We couldn’t imagine it to be anything other than a major male Stag Beetle in the family Lucanidae.  We quickly located your Stag Beetle on Community Idea Stations where it is identified as
Chiasognathus granti Stephens, the Chilean Stag Beetle or Darwin’s Stag Beetle.  The site includes an NPR interview with Dr. Art Evans who states that this is the only species in the genus that stridulates, and that Charles Darwin, in the Descent of Man, described the male’s use of his impressive mandibles to fight other males and defend females.  The Generic Guide to New World Stag Beetles has a map with its very limited range in Patagonia.

Thank you very much for the identification! I saw the Darwin’s Stag Beetle on jan 10th this year, but unfortunately the ranger, who found the beetle, killed the bug to bring it home with him (he was a forestry student). I hope there are stille lots of them in the vast Patagonian rain forests…
Best regards,
Henriette
Mvh Henriette

Dear Henriette,
We don’t want to imagine the worst, but we hope the ranger isn’t using his job to deal in the global insect trade.

 

What's That Bug? does not endorse extermination

Subject: A Lucanid, but further…?
Location: Kampong Lubok Gayau, Lundu, Sarawak, Malaysia
December 31, 2013 9:56 pm
We live in Lundu, Sarawak, on the island of Borneo, just about on the jungle. One morning I found this lovely critter clinging to the shower curtain. Length, about 50mm. While I’ve got family, Lucanidae, and possibly genus, Prosopocoilus, can yuo assess my information… and maybe even give me species?
Signature: Otto

Stag Beetle

Stag Beetle is male Cyclommatus canaliculatus

Happy New Year Otto,
Right now we only have time to confirm that this is a Stag Beetle in the family Lucanidae, and we can post your letter and photo, but we don’t have the time to research its species identity.  We have a prior commitment to attend to and we will continue to research this matter when we return.  Meanwhile, one of our readers might provide a comment or provide a link with a proper identification.

Update:  January 2, 2013
Thanks to a comment from Mardikavana, we now know that this is a male Cyclommatus canaliculatus.  We were able to find a photo on Wikimedia Commons and one on Beetle Space.

Daniel,
Fantastic!  Many thanks.
Otto

What's That Bug? does not endorse extermination

Subject: Big red bug
Location: Southwestern NJ
July 5, 2013 9:59 pm
Found this imposing looking bug on my kitchen screen door. Didn’t seem aggressive, but those pincers look like they hurt! Should I move and concede the territory?
Signature: Mel

Reddish Brown Stag Beetle

Male Reddish Brown Stag Beetle

Dear Mel,
In our opinion, you should not move and concede the territory because of your encounter with this male Reddish Brown Stag Beetle,
Lucanus capreolus.  Females have smaller mandibles.  Stag Beetles will use their mandibles to defend themselves, but as you observed, Stag Beetles are not aggressive, nor are they dangerous.  They are attracted to lights, which probably explains its presence on the screen door.

What's That Bug? does not endorse extermination

Subject: Enormous bug
Location: Skopje, Macedonia
July 4, 2013 6:33 pm
A few nights ago I was sitting in my yard, when suddenly, out of nowhere this enormous bug landed right behind me. Usually I love bugs – when they are small and cute :) But this one really scared me. So, if you have time, I would really appreciate if you can tell me what kind of bug this is. Thanks.
Signature: Monika

Stag Beetle

Stag Beetle

Hi Monika,
This impressive guy is a male Stag Beetle.  Though they are not dangerous, a Stag Beetle might use his impressive mandibles to pinch someone who carelessly handles him.  Stag Beetles are becoming endangered in many parts of their natural range.  We believe your European Stag Beetle is Lucanus cervus and you can read more about this magnificent creature on the British Natural History Museum website.

What's That Bug? does not endorse extermination

Subject: Is this a stag beetle?
Location: Northeast Pennsylvania (Pittston)
July 1, 2013 8:51 pm
I’m curious if this is a stag beetle and what type it is. This is the 2nd one I’ve seen the past two nights. I’ve been at my home over 10 years now, and this is the 1st time I’ve seen a beetle like this here. The photos are of the one I saw tonight. The one from last night was somewhat larger, and unfortunately, was not able to photograph in time. Since my dog actually found it on our back porch (and got a little pinch), I was wondering if this beetle is harmful to dogs?
Signature: Eric M

Stag Beetle Eyes Penny

Stag Beetle Eyes Penny

Dear Eric,
You are correct.  This is a Reddish Brown Stag Beetle, Lucanus capreolus.  It is a male and it is not harmful to people or pets, but you should be forewarned that he is capable of pinching and it is conceivable that a pinch might draw blood, but rest assured that the Stag Beetle has no toxins nor poisons known to man.  We hope your photo doesn’t start rumors that Stag Beetles and other bugs are responsible for our debt problems, especially given this home invasion.

Reddish Brown Stag Beetle

Reddish Brown Stag Beetle

What's That Bug? does not endorse extermination

Subject: Stag beetle
Location: Nashville, TN
June 27, 2013 12:45 pm
I think this is a stag beetle – I found it on my deck this morning. What do they eat and are they destructive? if there is one – can I assume there are more around? I live in Davidson County, Nashville, TN.
Signature: Rose B

Reddish Brown Stag Beetle

Reddish Brown Stag Beetle

Dear Rose,
This is a male Reddish Brown Stag Beetle,
Lucanus capreolus, and he is a magnificent creature.  According to BugGuide, adults feed on:  “Tree sap. Adults in captivity for study will readily drink diluted maple syrup or sugar water. Larvae feed in rotting logs. They are not harmful to vegetation.”  Stag Beetles can fly and they are attracted to lights, so this individual may have emerged some distance from your home.  Stag Beetles are not destructive.  They need rotting wood like stumps and logs to survive since the larvae take several years to mature.

What's That Bug? does not endorse extermination