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

Subject: Help us identity this bug
Location: Sedro Woolley, WA
January 9, 2014 4:57 pm
What’s this bug? Can’t tell from the picture, but it has 3 white lines on it’s wings. The picture was taken, 1/9/14 which is winter for us in the Pacific Northwest.
Signature: Elizabeth

Caddisfly

Caddisfly

Dear Elizabeth,
This is a Northern Caddisfly or Snow Sedge.  Caddisflies are often mistaken for moths, and according to BugGuide:  “Adults resemble moths, but wings are hairy instead of scaly.”  Caddisflies also share some behavioral characteristics with moths.  According to BugGuide:  “flight activity begins at dusk. Adults are attracted – sometimes in great numbers – to artificial light.”  Larvae, which are commonly called Caseworms, are aquatic, and of the habitat, BugGuide notes:  “Species most diverse in well-aerated streams, but also occur in lakes, ponds, and marshes.”

Thank you so much, Daniel Marlos!!

What's That Bug? does not endorse extermination

Subject: What is this bug?
Location: Near Darrington, WA
October 20, 2013 6:55 pm
Hello!
I found this bug near the Sauk River in Washington State. If you are able to identify it, I’d be very happy.
Signature: Darcy

Caddisfly

Caddisfly

Hi Darcy,
We hope an insect order will suffice.  This is a Caddisfly in the order Trichoptera.  According to BugGuide, there are:  “>1,350 spp. in ~150 genera of 22 families in NA” and we haven’t the necessary skills to provide a more specific taxonomy than the order.  Caddisflies are feeble fliers and they are often confused with moths.  Because they cannot fly great distances, they are generally found not far from water where the aquatic larvae develop.  Caddisfly larvae often build distinctive shelters from pebbles, shells, twigs and other aquatic detritus, and for that reason they are frequently called Casemakers or Caseworms.  Freshwater anglers use Caddisfly larvae as bait. 

What's That Bug? does not endorse extermination

Subject: Insect/Bug, Sitka Alaska
Location: Sitka, Alaska
March 18, 2013 9:15 pm
I actually found this bug inside our home. I thought it was a piece of plastic that came off of our grocery’s that we brought home. It looked shiny. I thought it was a sliver of plastic until I scooped it up and it moved in my closed hand. I kinda screamed and dropped it fast. Mind you I am a 50 year old Tlingit woman who was born and raised in Alaska. My husband calls me an ”urban indian.”
After I washed my hands in both the kitchen and bathroom sink, I composed myself and decided to rescue the insect by trapping it with a mason jar and piece of paper. It crawled on the paper and I put the mason jar over it and took it outside. I placed it on the wood deck and watched it for a long time. It only crawled around and stood still for most of the time.
It is about 2 inches long.
It has black beady eyes.
Long antennae’s.
Long skinny shiny brown and white spotted wings that hug its body at the side.
I’ve seen the wing colors in all various shades of brown and even orange. Like fish egg orange.
Sometimes spotted and not. Their wings look shiny too.
I’ve seen them with their legs and wings tucked in, so they look ultra skinny, hard to spot.
I think they like to hang around the Alaskan wet woods.
I’ve occasionally seen them and wondered what kind of bug is it.
My twin sister in Juneau said they never see that kind there.
Thank you very much!
Signature: Scared of insects, but fascinated with them

Snow Sedge

Snow Sedge

Dear Scared of insects, but fascinated with them,
We hope our response will prompt additional curiosity and not fear and loathing.  This is a Northern Caddisfly and previous research unearthed the common name Snow Sedge.  Please see our previous posting on the Snow Sedge for more information and links to our research.  Caddisflies cannot survive in polluted waters, so their presence is an indication of the purity of your local streams and ponds.

What's That Bug? does not endorse extermination

Subject: Seattle Mystery Bug
Location: Seattle WA
February 1, 2013 7:55 am
I was wondering if you could tell me what this brown flying insect is, as seen in a Pacific Northwest living room on 01/31/2013. I’ve never seen one of these before, and now this is the second one I’ve found inside a house in two days. It may be very common, but is new to me. It’s brown and about 1 1/2” long. The pattern on the wings makes it look like it is made of wood. I thought it was a moth when it first flew by, but it is sort of slow moving, a clumsy flier, and heavier. Any thoughts?
Signature: A

Caddisfly

Dear A.,
You have had an encounter with a Caddisfly in the order Trichoptera, and as we learned from BugGuide, there are:  “1,350 spp. in ~150 genera of 22 families in NA [North America]“
and we cannot say for certain how to classify it more specifically, though it does closely resemble several photos from the genus Psychoglypha that can be found on BugGuide.  Like you own observations, BugGuide notes that “Adults resemble moths, but wings are hairy instead of scaly.”  Larval Caddisflies are aquatic and they construct shelters, so they are commonly called Caseworms.  Interestingly, each species of Caddisfly Larva builds a different shelter, some of sticks, some of stones, some of shells and others from other materials.  According to bugGuide:  “Most species live in a mobile case constructed from plant material, algae, grains of sand, pieces of snail shells, or entirely of silk. The case is held together with strands of silk secreted by the larva. In some species the case is attached to a rock, log, or other underwater surface; a few species have no case and are free-living.  The case’s particular shape and construction material is distinctive of the family and/or genus, and can be used in identification. Example: Helicopyschidae larvae use sand grains to build spiral cases that resemble small snail shells.”

You are amazing! Thanks so much for the response. Mystery solved.

What's That Bug? does not endorse extermination

Subject: Pond Insect
Location: Oak Harbor (Whidbey Island), WA
June 15, 2012 2:26 pm
We started seeing these ”thatched cocoon” things floating in our pond in May. At first I thought they were worms but as they emerged their legs became visible. I’ve never seen anything like it! Any ideas?
Signature: Cyaxtin

Caddisfly Naiad

Dear Cyaxtin,
Though it is commonly called a Caseworm, your observations that this Caddisfly Larva is not a true worm is correct.  Aquatic larvae are usually called Naiads.  This Caseworm will metamorphose into a winged Caddisfly, a mothlike insect.  This is an awesome photo.  Each species of Caddisfly makes a distinctive looking case because of both the form and the materials used.  The case serves as a shelter during its larval stage.

Thank you soooo much!! Fascinating little creatures! I very much appreciate your time!
Krystal

What's That Bug? does not endorse extermination

October moth?
Location: Port Coquitlam, BC, Ca
January 19, 2012 11:40 pm
This (moth?) sat unmoving for several hours on the key guard of a near-by door. I really wanted a look at the abdomen, but thought it unfriendly to poke at it. Total legnth of about 5 cm, including antennae. Photos taken on October 5/11.
thank you!
Storm Vos-Browning
Signature: Storm

Caddisfly

Hi Storm,
Though it is mothlike, this insect is actually a Caddisfly in the order Trichoptera.  Caddisflies have aquatic larvae that carry cases about with them earning them the common name of Caseworm.

Hi Daniel,
For a small team with a backlog, you sure answered my question FAST! Thak you. The forward pointing antennae looked wrong for a moth, as did the mouth parts, but I’m not very good at identifying insects. Love watching them, though – I’ve spent hours watching caddisfly larvae in local waterways, but didn’t know what the adults looked like.
As with the stink bug nymph you ID’ed for me back in August, I’ll post a link to What’s That Bug? when I post the photo on my blog.
best wishes,
Storm

Thanks for the positive comments Storm.  So, you raise Killies?  The African Aphyosemion species are really spectacular fish.  We have our own Angelfish aquaria going.  We are sticking to Amazon species for now.

Wow, Daniel, you actually checked out the link? No one ever does that!
“Amazon species” is a huge category – you’ll never run out of cool species. I’m personaly captivated by the small, nocturnal driftwood cats, the corydoras and farlowellas.
The unidentified critter Lori asks about at the bottom of the page looks to be a seed shrimp (Ostracod) but the photo is indistinct. I don’t know how you manage to ID bugs from photos!
you run an awesome site!
cheers, Storm

What's That Bug? does not endorse extermination