Currently viewing the category: "Geometrid Moths"
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Subject: I this a female Imperial Moth?
Location: Sheboygan, WI
July 4, 2017 8:30 am
I found this moth attached to the siding on our porch in Sheboygan, WI. I have never seen anything like it before. It was about 1 1/2 inches from wing tip to wing tip. The stripe is definitely black, not brown. All of the information I found about Imperial Moths suggest that they are yellow with brown. What is this? Thanks!
Signature: Mary

Yellow Slant Line

Dear Mary,
This very lovely Geometer Moth is not a female Imperial Moth, though both are yellow.  We will be searching BugGuide for its identity, but in the meantime, we are posting it as unidentified.

Hello again Mary,
We identified your Geometer Moth as a Yellow Slant Line, Tetracis crocallata, thanks to images on Moth Photographers Group, and we verified its identity on BugGuide.  According to BugGuide:  “Larvae feed on leaves of alder, chestnut, sumac, willow” and “Larva – a twig mimic; young instars have brown head and green body with white intersegmental membranes; older instars have two morphs: (A) reddish-brown with 2 pairs dorsal and 2-3 pairs lateral white tubercles; T1 with forward projections tipped white (B) light brown to gray with no white tubercles; T1 projections present, but not white; morph B is similar to A. pampinaria but has no dorsal tubercles on A7 [adapted from description by Pedro Barbosa].”

Wow! Thanks, Daniel! I wonder how this poor thing ended up in Wisconsin.
I really appreciate your assistance.
Just an FYI, I left it alone. I am not in the habit of killing creatures of any sort.
Mary

Dear Mary,
Based on BugGuide data, Wisconsin has reported sightings of the Yellow Slant Line during the months May through August.

What's That Bug? does not endorse extermination

Subject: Moth id
Location: Southern Portugal
December 9, 2016 2:41 pm
Could you id this moth for me please. I’ve had no success elsewhere.
The photo was taken in southern Portugal in May.
Signature: David B

Diurnal Moth

Diurnal Moth

Dear David,
Perhaps our readership will have better luck identifying this lovely, orange, diurnal moth since our initial search has not produced an answer for you.  We searched both Encyclopedia of Life Moths of Portugal and The Lepidoptera of Portugal.  We suspect this moth is either in one of the following families:  Geometridae, Pyralidae, or Crambidae.

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Subject: Large moth
Location: Winnipeg
August 6, 2016 8:53 pm
Hi. I saw this moth on the side of a shed in my backyard. It is large – 3-4 inches across. Can you identify it for me? Thanks for your help.
Signature: Todd

Common Lytrosis

Common Lytrosis

Dear Todd,
After a bit of searching, we identified your Geometrid moth as a Common Lytrosis,
Lytrosis unitaria, thanks to this BugGuide image.  According to BugGuide:  “Forewing length 21 to 30 mm., females larger than males.”  Though BugGuide does not list any Manitoba sightings, The Moth Photographers group does list a sighting that appears to be Winnipeg.

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Subject: Striped Moth, Monteverde, Costa Rica
Location: Monteverde, Costa Rica
August 7, 2016 2:17 am
Hi,
I’ve recently tried to identify some of the insects I photographed in Costa Rica, in the summers of 2009 and 2011. I have had some success (this site has been of great help), but this fellow has been eluding me so far, so I figured I’d ask the experts.
This was taken in Monteverde, Costa Rica, on June 27, 2011.
Thanks in advance
Signature: Thibaud Aronson

Geometer Moth: Pityeja histrionaria

Geometer Moth: Pityeja histrionaria

Dear Thibaud,
Considering the beauty of this striking moth, this was one of the more difficult searches we have undergone in recent memory, but before we provide you with the information we have gleaned from the internet, we first need to rant on Pinterest.  In our minds, the Pinterest site is the scavenger of the internet.  Pinterest pilfers images from other sites, and because it has so many users, search engines bring up images on Pinterest even before they bring up those same images on the originating sites.  Then one must register to even access the original site.  We are deeply offended by Pinterest.  Our word searching led us nowhere, so we decided to do an image search, which we rarely do, and the only two internet images we could locate of your moth were on Pinterest, but we could not trace the originating sites since we flat out refuse to register on Pinterest.  Now that we have that off our collective chest, we can tell you what we learned.
Our first lead was a FlickR posting by Andreas Kay of an image taken in Ecuador, and we learned the identity of
Pityeja histrionaria in the family Geometridae.  On FocusOnNature we learned:  “Pityeja histrionaria ranges extensively in much of South America. It occurs from Mexico to southern Brazil.”  Though we did not learn much more about the moth, we located another image from Ecuador on FlickR, an image from Peru on Project Noah and an image on the National Moth Week site with no location.  Several sites have images of mounted specimens, including Lepidoptera Barcode of Life and Encyclopedia of Life.  This looks to us like it would be a diurnal or day flying species.  Are you able to provide any insight?  Did you find this lovely Geometer Moth in the morning after it had been attracted to a light lit at night?

That’s the one! Thanks for the amazingly fast reply!
I apologize, I should have specified, I did see this one at night, attracted to the lights of the field station.
As for Pinterest, I fully share your sentiment, and all I can say is that I neither have an account nor use it myself.
Cheers
Thibaud

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Subject: Horned spanworm moth and large maple spanworm moth
Location: Troy, VA
June 26, 2016 11:02 am
Given my horrible guess on the last moth, I hesitate to say I know what these are, but I spent a lot of time at the Discover Life website comparing photos, so I can say with reasonable certainty that I have a photo of a horned spanworm moth. I’m not quite as certain about the large maple spanworm moth, but I found images that were very similar so I’m going to give it an 85% certainty. Fingers crossed. I do love their amazing leaf mimicry.
thanks
Signature: Grace Pedalino

Possibly Horned Spanworm Moth

Possibly Horned Spanworm Moth

Dear Grace,
Leaf-mimicking, brownish Spanworm Moths in the family Geometridae can be extremely difficult to identify to the species level, and we often avoid such specifics, preferring a general family identification.  We agree that one of your moths is possibly the Horned Spanworm Moth,
Nematocampa resistaria, based on images posted to BugGuide.  We are not convinced that your second moth is a Large Maple Spanworm.  We believe it looks more like the Curve-Toothed Geometer, Eutrapela clemataria, a species also pictured on BugGuide.  In both cases, we wish someone with more experience determining the species of Spanworm moths would weigh in on an identification.

Possibly Curve-Toothed Geometer

Possibly Curve-Toothed Geometer

What's That Bug? does not endorse extermination

Subject: Moth ID
Location: Michigan
June 13, 2016 11:32 am
I am having issues id’ing this moth. We found them in upper Michigan in the pine barrens where the Kirtland’s warbler nests. I have narrowed it down to a possible black-banded orange (Epelis truncartaria)
Signature: Glenn

Black Banded Orange

Black Banded Orange

Dear Glenn,
In our opinion your identification is absolutely correct, after we compared your image to this image of a Black Banded Orange,
Epelis truncataria, on BugGuide.  According to BugGuide:  “Adults fly during the day and are not known to be active at night.  Generally uncommon and local in the southern parts of its range; common and widespread across the boreal forests of Canada and Alaska.”

What's That Bug? does not endorse extermination