Currently viewing the category: "Stag Beetles"

Subject:  A bronze lucanid species
Geographic location of the bug:  Seoul, Korea
Date: 11/25/2018
Time: 03:26 AM EDT
Your letter to the bugman:  I found this little bugger last month. Our security guard attempted to kill it, but I saved it just in time. I think it’s a Prismognathus dauricus because I saw a picture of that in my insect encyclopedia. Here is my picture with my Nippondorcus rubrofemoratus and another pic only showing himself. I heard that they only live for 1~2 months so I decided to keep it.
How you want your letter signed:  William Hong

Stag Beetle

Dear William,
Thanks for sending in your images of two species of Stag Beetles from Korea.  We located an image of
Prismognathus dauricus on Insect Collectors Shop and it does look similar as does the image on Projects Biodiversity.  Also, many thanks for your comments on images in our archives that we identified as probably being Scarab Beetle grubs that you believe are Stag Beetle grubs.

Two species of Stag Beetles

Subject:  Cottonwood Stag Beetle
Geographic location of the bug:  South-Central Utah
Date: 08/04/2018
Time: 01:53 PM EDT
Your letter to the bugman:  I noticed in one of your posts you mentioned being surprised that these beetles range as far west as Utah. This one was found (alive) near Capitol Reef National Park. I’ve lived here for nearly 20 years and this is the first one I saw here. Perhaps range is extending due to climate change. Anyway, thought I’d provide another specimen for your guide.
How you want your letter signed:  Guy Tal

Cottonwood Stag Beetle

Dear Guy,
Thanks so much for providing this awesome image of a Cottonwood Stag Beetle.

Subject:  Large black beetle found in house
Geographic location of the bug:  South-east Wisconsin (Wind Lake)
Date: 06/26/2018
Time: 07:34 PM EDT
Your letter to the bugman:  Hello! My name is Lexi and I live in South-eastern Wisconsin.
I was on my laptop when my dad called me into the kitchen exclaiming that there was a large bug found. This big was about 1-2 inches long and had wide black pinchers. We did not, in fact, kill the bug but put it out on the porch in the rain. The picture is the bug right way up on a napkin which was used to carry it outside.
How you want your letter signed:  Best Regards and Respect. ~Lexi

Stag Beetle

Dear Lexi,
Because you described this Stag Beetle as black, we suspect it is
Lucanus placidus, which is described on BugGuide as “Similar to L. capreolus, but much darker, elytra more punctate. Legs dark reddish brown, no light brown patches as in capreolus. Several small teeth on inside of mandibles of male–capreolus has only one.”

Thank you for responding so quickly! I was just wondering, would you consider this Stag beetle a male or a female?

It appears to be a male.

Subject:  Cottonwood Stag Beetle
Geographic location of the bug:  New Castle, Colorado
Date: 06/26/2018
Time: 12:25 AM EDT
Your letter to the bugman:  I was picking up some trash in my yard when i noticed a pretty big black beetle eating what looked like a smaller beetle without its head. I took it inside to show my family and when I went to go let it back outside there was another one right where i found the other one!
How you want your letter signed:  KD

Cottonwood Stag Beetle

Dear KD,
Thanks so much for sending in your images of male Cottonwood Stag Beetles,
Lucanus mazama, though we believe the predatory behavior you believe you witnessed was actually something else.  The Generic Guide to New World Scarab Beetles has a nice comparison to help differentiate the sexes of the Cottonwood Stag Beetle.

Cottonwood Stag Beetles

Subject:  Large beetle w pincers
Geographic location of the bug:  Lilburn, Ga
Date: 06/23/2018
Time: 01:49 PM EDT
Your letter to the bugman:  I found this guy in the driveway.  I’ve lived here for 10 years, and NEVER seen anything like him.  We live in an older community with lots of wooded areas and a small lake.  I’m afraid he may be dead.
How you want your letter signed:  Missy Skinner

Giant Stag Beetle

Dear Missy,
This is a very impressive Giant Stag Beetle.

Subject:  What’s this beetle
Geographic location of the bug:  Minnesota
Date: 06/08/2018
Time: 09:21 PM EDT
Your letter to the bugman:  Can you tell me what these are and why they are borrowing into the ground at my oak tree? There’s a bunch of them!
How you want your letter signed:  Brian

Stag Beetles Emerging after Metamorphosis

Dear Brian,
We wish you had more clarity in your amazing image of what we believe to be Stag Beetles emerging from the ground after metamorphosis, because we would like to be able to see details in the antennae.  We suspect your Stag Beetles are Lucanus placidus based on an image on The University of Minnesota Yard and Garden News page where it states:  “People have been finding stag beetles in their yards and gardens recently, sometimes in large numbers. Also known as pinching bugs, these beetles typically measure a little more than one inch in size and are reddish brown to dark brown in color. Stag beetles resemble June beetles but have more prominent heads. The mandibles (jaws) of both sexes are also large and conspicuous, especially those of males. Stag beetles have short antennae with conspicuous asymmetrical plates (lobes) at the end of them which they are not able to close together. One of the most common species in Minnesota is Lucanus placidusAll stag beetle larvae feed in dead or decaying wood, such as logs and stumps. Most adults emerge in May or June and feed on sap that exudes from plants. Stag beetles are active at night and are often attracted to lights. They can fly into a yard, land on the ground and remain there until the following morning. Some people have observed stag beetles emerging from the ground. This indicates that there are some old roots or other buried decaying wood where the larvae were feeding and developing.  Although a lot of stag beetles in a yard is annoying, they are harmless to people and property. Do not spray stag beetles, their control isn’t necessary. Just ignore them until they go away on their own.”  Elsewhere on the University of Minnesota site it states:  “Beneficial as a recycler of decaying wood; does not harm people or damage turf or trees.”  

Stag Beetles

Thank you for your response! I appreciate it. 
Brian Norby