Currently viewing the category: "Horntails, Wood Wasps and Sawflies"
What's That Bug? does not endorse extermination

Subject: Unknown red caterpillar
Location: Southwest Ohio
August 6, 2017 8:08 pm
I found this red caterpillar today in a woods in SW Ohio. Andy idea what it is? I’m outside a lot and have never seen one before.
Signature: Terry

Sawfly Larva

Dear Terry,
Though it looks like a Caterpillar, this is actually a Sawfly larva and it will become a non-stinging adult Sawfly related to bees and wasps.  We believe your Sawfly larva is in the genus
Cimbex.

Thank you!  I noticed the link you sent was from Caesar Creek Lake, about 40 miles from here.  I’m a biologist, but insects are not my strength, and I’ve never seen one of these before.

What's That Bug? does not endorse extermination

Subject: Huge flying wasp/hornet
Location: Québec
July 17, 2017 1:21 pm
Hey guys I saw this huge thing in a swampy area in the woods of western Canada (Québec ) I wanted to know what species it could be? Thanks guys.
Signature: Emil

Elm Sawfly

Dear Emil,
The Elm Sawfly is a non-stinging relative of wasps and hornets.

What's That Bug? does not endorse extermination

Subject: What am I?
Location: Northern maine
June 30, 2017 4:21 pm
I have groups of these guys in my potato plants this summer. Not sure what they are, if they sting, if they bite or if they are eating my plants. Please help if you can.
Signature: DAMMhstead

Sawfly

Dear DAMMhstead,
We believe we have correctly identified this Sawfly as
Trichiosoma triangulum thanks to this BugGuide image.  According to BugGuide:  “Larvae feed on leaves of alders (Alnus), ash (Fraxinus), poplars (Populus), willows (Salix), cherries (Prunus)”  so we can’t explain why they are interested in your potato plants.  Sawflies do NOT sting, but they are classified in the insect order Hymenoptera that includes wasps and bees.

What's That Bug? does not endorse extermination

Subject: Wasp or hornet
Location: Cold lake,Alberta Canada
July 7, 2017 9:36 pm
Found this massive guy in our pool! Not sure if it’s wasp or hornet.
Signature: Emma

Elm Sawfly

Dear Emma,
This is neither a Wasp nor a Hornet.  This is an Elm Sawfly, and though it does not sting, it is nonetheless classified with Wasps and Bees in the insect order Hymenoptera.

What's That Bug? does not endorse extermination

Subject: Giant flying monster
Location: Alberta, canada
June 29, 2017 8:41 pm
I rescued this from my kids pool, left it in the sunshine to dry out. My bug go to people have no idea. We live in northern alberta, Canada by the Athabasca river.
Signature: Susie Jack

Elm Sawfly

Dear Susie Jack,
This impressive creature is an Elm Sawfly, a non-stinging relative of Bees and Wasps.  Larvae of the Elm Sawfly look like caterpillars and they feed on leaves, and according to BugGuide:  “hosts include elm (
Ulmus), maple (Acer), birch (Betula), willow (Salix), and basswood (Tilia).”  Because of your rescue efforts, we are tagging your submission with the Bug Humanitarian Award.

What's That Bug? does not endorse extermination

Subject: Curious as to what this creature is
Location: Brandon, Manitoba, Canada
June 3, 2017 8:06 pm
Hello, I was recently at a friend’s place when this creepy fellow was spotted on the ground… managed to snap a picture of it before it noticed me and flew at my face then away. Any help being able to identify this mysterious work of art would be greatly appreciated… it looks like something out of a night mare.
Signature: Robert Boretz

Elm Sawfly

Dear Robert,
This is an Elm Sawfly,
Cimbex americana, a non-stinging relative of bees and wasps.  Here is a BugGuide image for comparison.  According to BugGuide:  “not considered a forestry problem, but [larvae] can defoliate shade/ornamental elms and willows.”  Elm Sawfly larvae are frequently confused with Caterpillars.

Daniel, thank so very much for your timely and accurate response! I’ve been itching to know what that thing was since the moment I seen it. I have had horrible thoughts of it somehow wrapping it’s tiny legs around my face and sucking my brain out ( albeit not possible, but it looks like the sort of bug that would attempt it) I can rest easy now knowing that it is non stinging and has really no interest in causing harm unlike its A*hole relative the wasp. Your help identifying this little fellow is greatly appreciated, thank you for your time!
Rob
What's That Bug? does not endorse extermination