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

Subject: What is this bug?
Location: Jamestown, Tennessee
October 10, 2013 10:56 am
I’m a high school senior this year and currently enrolled in a Biology II class. We recently did an experiment where we placed decomposing leaves in a mesh bag and let our leaf packs sit in water for three weeks. When we opened our leaf packs today, this bug was in our packet. No other group had anything like it, and our teacher could not identify it. Do you know what this could be?
Signature: Alex

Unknown Larva

Unknown Larva might be a Hellgrammite

Hi Alex,
Unlike your Biology teacher, we do not have a background in natural sciences.  We are very curious what this experiment was supposed to produce.  What kind of water were the leaf packs sitting in?  Was it distilled water or were the packs tossed into a lake?  Since the packet was under water, this larva must be aquatic.  At first we thought it was a Hellgrammite, but upon enlarging the thumbnail that was attached to the email, we realized that the appendages typically present along the abdomen of Hellgrammites, the larval form of Dobsonflies, appear to be absent.  The head of your larva does appear quite similar to the head on this Hellgrammite posted to BugGuide.  Perhaps one of our more knowledgeable readers will correct us, but we are still leaning toward this being a Hellgrammite.

What's That Bug? does not endorse extermination

Subject: river bug in Iowa
Location: Winnebago River, Mason City IA
June 9, 2013 11:32 pm
We saw several of these bugs along a river trail today after very heavy rainfall and slight flooding. Any idea what these are?
Signature: Elizabeth Haag

Hellgrammite

Hellgrammite

Hi Elizabeth,
This is a Hellgrammite, the semiaquatic larval form of a Dobsonfly.  For years, we have been trying to uncover the origin of the name Hellgrammite, but alas, our searching has not proven fruitful.  We are also hoping to eventually be able to post a photo of a pair of Dobsonflies mating.

What's That Bug? does not endorse extermination

Subject: Scary…ish bug?
Location: Smithton, Pennsylvania
May 28, 2013 9:47 pm
Hi!
Today, I was walking on a trail today (a chilly 29th May) and found two of these. After numerous searches, I’m at a loss as to what these are, because I was pretty fascinated by them. The trail is in Western Pennsylvania, nearby a river. There’s lots of woods around, and lots of streams and springs, and such – if that’s helpful.
Thanks for your help!
Signature: Z

Hellgrammite

Hellgrammite

Dear Z,
This is a Hellgrammite, the larva of a Dobsonfly.  We just postdated an image of a male Dobsonfly to go live on June 5 since we will be away from the office.  We are going to postdate your Hellgrammite image to go live on June 6.

What's That Bug? does not endorse extermination

Subject: what is this bug?
Location: west central wisconsin
May 31, 2013 4:29 am
My son found this crawling up his garage wall. He said it was about 4 inches long, with many legs, and a very sturdy body. It resembles the pictures of the water Tigers but has many more legs. They just moved into this place which is right next to a river in west central Wisconsin and they’re curious to know if they’re going to be seeing more of these kind of bugs.
Signature: bug identification

Hellgrammite

Hellgrammite

Congratulations on being introduced to a Hellgrammite.  These semiaquatic nymphs are usually found not far from water, so the river you mentioned is most likely its origin.  Hellgrammites eventually metamorphose into fearsome looking, but perfectly harmless Dobsonflies.

What's That Bug? does not endorse extermination

Subject: Caterpillar type bug found
Location: Brazos River, Marlin, Tx
March 30, 2013 7:23 pm
We are in Texas and this is the second time I’ve seen one of these. It looks like a giant larvae or kind of like an earwig. It’s about 3 inches in length. I found it in shallow water under a rock on the Brazos River in Central Texas.
Signature: Scott M.

Hellgrammite

Hellgrammite

Dear Scott,
We love posting photos of Hellgrammites, the aquatic larvae of Dobsonflies.  Hellgrammites are a favorite bait for fresh water fishermen.
  We have still not been able to discover the origin of the name Hellgrammite.

Hellgrammite

Hellgrammite

What's That Bug? does not endorse extermination

Subject: What’s this bug?
Location: Grand River, northeastern Ohio
December 2, 2012 10:14 am
We found this bug in the shallows of the Grand River in NE Ohio in early november. Only the 1st 3 pairs of protrusions are legs, the rest are just spines. 4 inches long end-to-end.
Never seen anything like it. What is it?
Signature: Ian Griffith

Hellgrammite

Hi Ian,
The aquatic Hellgrammite, the larva of the winged Dobsonfly, is a favored bait of freshwater fishermen.

What's That Bug? does not endorse extermination