Currently viewing the category: "Stoneflies and Snowflies"
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Subject: Bug Identification
Location: Upstate South Carolina
April 14, 2016 6:55 pm
Dear bugman,
This lovely creature flew up to me and said hello and I have never seen like it before!
I would love to know what it is so that I can educate myself further :)
Thank you mucho,
Best,
Kate
Signature: Keep Learning! -Bugman

Giant Stonefly

Giant Stonefly

Dear Kate,
This is a Giant Stonefly in the genus Pteronarcys, and there are several possible species that are found along the eastern seaboard.  You can browse through the images on BugGuide for comparison.

What's That Bug? does not endorse extermination

Subject: Please help with ID
Location: Rhode Island, USA
April 4, 2016 8:24 am
Hi Bugman,
I found about ten of these clinging to the outside of my house at the end of February (unseasonably warm day). Can you help identify?
Thanks!
Signature: jkayman

Stonefly

Stonefly

Dear jkayman,
This is a harmless Stonefly.  They are generally found not far from a stream or river.  Additionally, according to BugGuide:  “nymphs of most spp. develop in cool, well-oxygenated water and do not tolerate pollution; therefore, their presence is an indicator of good water quality, and their absence in areas where they previously occurred may indicate pollution.”

Thank you very much Daniel.  I do indeed live by a river.
Appreciate it.
John

What's That Bug? does not endorse extermination

Subject: Insect
Location: Maple Ridge, British Columbia
March 26, 2016 5:23 pm
I was working outside at a mill and we are situated along side the Fraser River. I always see strange bugs like the one pictured.
I’m trying to figure out what this insect is called.
I found it March 26th 2016( today)
The bug barely moved.I picked the bug up with a stick because the underside of his body was yellow. and I wanted to get a picture of it. The bug had a good grip.
I assumed it was just getting out of hibernation, as spring is upon us now.
I tried google image search, the result was dobsonfly, alderfly or fishfly.
Is this bug any of those three?
Signature: Corinne

Ebony Salmonfly, we believe

Ebony Salmonfly, we believe

Dear Corinne,
Though it resembles a Dobsonfly, Alderfly or a Fishfly in the Order Megaloptera, your insect is actually a Giant Stonefly in the genus
Pteronarcys, commonly called a Salmonfly.  A comment posted to this BugGuide image indicates it is possibly the Ebony Salmonfly, Pteronarcys princeps, and the coloring matches your individual, but as the commentor indicates “two species here in CA and you need to see the naughty bits to tell them apart”, we cannot be certain of the species.  BugGuide lists British Columbia as a sighting location for the Ebony Salmonfly.

Probably Ebony Salmonfly

Probably Ebony Salmonfly

Ebony Salmonfly, we presume

Ebony Salmonfly, we presume

What's That Bug? does not endorse extermination

Subject: help with this bug
Location: Oakville , Ontario , Canada
February 17, 2016 9:41 am
I saw many of these bugs in the snow , sorry this is not the best of photos , this one had blue hue on its lower body , a couple of others had a brown hue , may be male , female , they were abut one centimetre in length , never seen them before , I was close to water in the harbour
Signature: Stewart

Snowfly

Snowfly

Dear Stewart,
Congratulations on your Snowfly or Small Winter Stonefly sighting.  Small Winter Snowflies are in the family Capniidae, and the exact genus and species might be difficult to identify conclusively and according to BugGuide:  “many species are restricted to relatively small areas.”  BugGuide also indicates:  “nymphs [are found] beneath rocks and gravel on the bottom of streams and rivers; adults often seen on snow, or resting on concrete bridges over streams.”  They cannot survive in polluted conditions, so the presence of Snowflies is an indication that the water in the area is pure.  The blue coloration in your individual is quite interesting and unnatural looking, resembling a digital imaging aberration much more than it does the natural coloration of any Snowfly image we have seen.  BugGuide also has many images of Snowflies in the snow.

What's That Bug? does not endorse extermination

Subject: Termite or something else?
Location: Northern Iowa
July 30, 2015 6:48 am
I have found many of these bugs inside the house over the past week. We just moved into the house a few weeks ago. We live in northern Iowa in a town where apparently there are no termites… But these bugs look exactly like termites. I have researched online and cannot find any other bug it resembles.
Signature: K.P.

Stonefly

Stonefly

Dear K.P.,
Thanks to this image on BugGuide, we believe we have correctly identified your Stonefly as a member of the genus
Perlesta.  Stoneflies have aquatic nymphs, so we are guessing you live near some body of water.  Like other aquatic insects, Stoneflies frequently are part of a mass emergence of 1000s of individuals, and some species may be attracted to lights, which is why you are currently finding them in the home.  The emergence will not last long and you will probably have them vanish in the near future.  Though this may be a temporary nuisance, Stonefly larvae cannot live in polluted waters, so you can be comforted that your local water supply is clean.

What's That Bug? does not endorse extermination

Subject: Fishfly maybe?
Location: Central PA
May 7, 2015 6:11 am
Found several of these guys at our cottage on the river over the weekend. We haven’t noticed them there before. They look a bit like fishflies, but all had a red band around the neck. Is this a trait that fishflies can have, or a different insect all together?
Signature: Kayla

Fishfly

Giant Stonefly

Dear Kayla,
Your insect is a Giant Stonefly in the genus
Pteronarcys, and according to BugGuide they are also called Salmonflies.  Just for fun, here is a link to one of our favorite Giant Stonefly postings.

What's That Bug? does not endorse extermination