Currently viewing the category: "brush footed butterfly caterpillars"
What's That Bug? does not endorse extermination

Subject:  Gold spiked chrysalis
Geographic location of the bug: n South Central Va
Date: 06/18/2018
Time: 06:08 PM EDT
Your letter to the bugman:  Hello,
Thank you for all of your hard work over the years, I’ve found you again after some time.
I really just want to share with you my photos, it might be something you’ll appreciate.
How you want your letter signed:  From Juicy – Steady as she goes

Variegated Fritillary Chrysalis

Dear Juicy-Steady as she goes,
This beautiful chrysalis is that of a Variegated Fritillary.

What's That Bug? does not endorse extermination

Subject:  black caterpillar
Geographic location of the bug:  Noth Umpqua area of Oregon
Date: 06/13/2018
Time: 04:44 PM EDT
Your letter to the bugman:  Hi I’ve been having trouble identifying this critter. They showed up June 2, 10 days ago by the thousands. At first they were about 1″ long , now they are around 2″. I’ve been watching their progress and today I noticed some pupae forming. I had thought they were Ceanothus Silk Moth caterpillars but now I don’t thinks so.
How you want your letter signed:  Thanks Bill

Tortoiseshell Caterpillar

Dear Bill,
We immediately wrote back to see if you could provide the name of the plant upon which these Tortoiseshell Caterpillars are feeding, because we are certain the genus is
Nymphalis, but we are not sure of the species.  Our likeliest candidate because they are often found in great numbers is that they are Mourning Cloak Caterpillars, but the caterpillar lacks the red spots found on Mourning Cloak Caterpillars and the chrysalis does not really look right.  According to BugGuide, Mourning Cloak Caterpillars feed on ” primarily willow (Salix spp.) but also other trees and shrubs including Cottonwood (Populus deltoides), Trembling Aspen (P. tremuloides), American Elm (Ulmus americana), Paper Birch (Betula papyrifera), and Hackberry (Celtis occidentalis).”  Based on images posted to BugGuide, we believe they are probably California Tortoiseshells, and Oregon is well within the range, and since BugGuide states “Larva feeds on various species of wild lilac (Ceanothus),”  knowing the food plant would greatly assist in the identification.  Our least likely candidate due to your location is the Compton Tortoiseshell because most caterpillars are green, but BugGuide does picture this black individual and BugGuide indicates the range as being “southeastern Alaska and across Canada south of the tundra, south in the west to Montana and Wyoming, south in the east to North Carolina and Missouri known to wander; has been recorded as far south as California and Florida, and as far north as Baker Lake, north of treeline in Nunavut” and also states “larvae feed in groups on willow (Salix spp.), birch (Betula spp.), and poplar (Populus spp.).”  In recapping, we are leaning toward California Tortoiseshells, and knowing they were feeding on Ceanothus would seal the deal for us.

Metamorphosis of a Tortoiseshell Caterpillar

Hi Thanks for the response They were feeding on Buckbrush (Ceanothus) and Schoolers Willow. There were people clearing trees and brush from under a major powerline up the hill behind me and they said that the caterpillars completely defoliated over 2 acres of buckbrush. Yesterday I was still seeing them coming towards our home and on the driveway but it is slowing down and they are attaching and forming  the chrysalis. I’m sure looking forward to seeing them when they emerge. Thanks Bill

Please try to send us images of any adults that emerge.  That will surely verify the species.

Tortoiseshell Chrysalis

How long will they be in the Crysalis? It’s warming up to the 90’s next week.

Two weeks is a good average, but temperature and humidity may affect eclosion time.

What's That Bug? does not endorse extermination

Subject:  What is this caterpillar?
Geographic location of the bug:  Winnipeg, Manitoba, Canada
Date: 06/10/2018
Time: 08:30 PM EDT
Your letter to the bugman:  I found this caterpillar climbing on my front door yesterday. (picture 1)  Today I caught him j’ing (picture 2) He has now turned into a chrysalis.   (picture 3)  There is a second one of the same sort at the bottom of my door.  He is green with a dark head and has barbed setae or spikes.   I would like to know what kind of caterpillar he is and what he will become.  I hope you can help me.  Thanks!
How you want your letter signed:  Sherrie

Compton Tortoiseshell Caterpillar

Dear Sherrie,
How lucky are you???? We have identified your caterpillar as a Compton Tortoiseshell Caterpillar,
Nymphalis l-album, thanks to images posted to BugGuide.  The caterpillar and chrysalis are described on BugGuide,:  “Larva: body speckled and spotted white on pale green, yellow and brown, or blackish, with several rows of branched, usually black spines; head also bears many short spines, with one pair larger and branched near the tip. This is the only Nymphalis species with the pair of branched head horns. Polygonia larvae are similar, though usually with different markings.  Pupae: similar to other Nymphalis and to Aglais species, with two points on head end and two rows of conical projections mostly arranged along the dorsum of abdomen + thorax; plus, one prominent point on the mid-dorsum and more along the sides of the thorax.”  According to BugGuide, the range is:  “southeastern Alaska and across Canada south of the tundra, south in the west to Montana and Wyoming, south in the east to North Carolina and Missouri known to wander; has been recorded as far south as California and Florida, and as far north as Baker Lake, north of treeline in Nunavut.”   The chrysalis of the Compton Tortoiseshell is pictured on the John Fowler website.  If your luck continues and you are able to witness the emergence of the adult Compton Tortoiseshell, we would love to have you send us the images.

Pre-Pupal Compton Tortoiseshell Caterpillar

Dear Daniel,
Thank you so much!  I was curious to see what kind of caterpillar it was.  The caterpillar crawled up my front door and decided that was the place to stay.  Ot was interesting to see him in the j.  An hour and a half later he was a chrysalis.  Only assuming it was that long because that is when I came back from shopping.  I now have another one below my front door, so I have the opportunity to witness two emerge.  I hope they do it while I am watching.  Do you know how long they will stay in the chrysalis before they emerge?
Thank you again,
Sherrie

Hi again Sherrie,
The actual eclosion date, the day the adult emerges from the chrysalis, may vary depending upon temperature and other weather conditions, but according to BBC:  “The chrysalis stage varies between species but is usually around two weeks, whilst the caterpillar inside is undergoes metamorphosis into a butterfly. In order to emerge, they need to be out of direct sunlight, at around 25 degrees and in relatively high humidity.”  According to Woodland Trust:  “Conversion to a butterfly takes place inside the chrysalis – this process can take several weeks.”  According to Sciencing:  “Most butterflies take about 10 to 14 days to emerge from their chrysalises.”  Many chrysalides change color just prior to pupation, so that might be a hint that eclosion is near.

Chrysalis of a Compton Tortoiseshell

What's That Bug? does not endorse extermination

Subject:  Common Buckeye, maybe
Geographic location of the bug:  Southeastern New Mexico
Date: 10/28/2017
Time: 05:54 PM EDT
I found this guy flitting around in my yard.  He landed in the grass and posed for several pictures.  I thought he was perfect for fall – brown, orange, cream, along with great eyespots.  Looking on your site, I found the Common Buckeye, they looked like a match.  For all that it is a “common” butterfly, I don’t recall seeing one before.  It looked like your last Common Buckeye submission was from a few years ago, so I thought I’d send it in.
How you want your letter signed:  Curious

Common Buckeye

Dear Curious,
We believe this is a Common Buckeye, but according to BugGuide, the similar looking Tropical Buckeye is also found New Mexico.

What's That Bug? does not endorse extermination

Subject:  Query regarding a thingamajig bug
Geographic location of the bug:  IN North India
Date: 10/15/2017
Time: 05:06 AM EDT
I plucked this thing from my mango tree and now I want to know more about it .
How you want your letter signed:  Ayush

Baron Butterfly Chrysalis

Dear Ayush,
This is such a geometrically angular butterfly chrysalis, that we were very excited to attempt to identify it.  Thanks so much for indicating the food plant is mango, because we quickly identified this Baron Butterfly chrysalis, 
Euthalia aconthea, thanks to Alamy.  According to Daily Mail:  “The species is common in Singapore and is usually found on mango tree leaves and is sometimes considered a pest. Eventually, the caterpillar metamorphosizes into a butterfly, via a green, leaf-like chrysalis.”  According to Butterflies of Singapore:  “Eight days later, the pupa becomes considerably darkened, especially in the wing case area, signaling the end of the development of the adult still encased within. The next day, the adult butterfly emerges.”

Baron Butterfly Chrysalis

What's That Bug? does not endorse extermination

Subject:  What moth/butterfly does this chrysalis belong to?
Geographic location of the bug:  Baltimore Maryland
Date: 10/11/2017
Time: 04:15 PM EDT
Hello this chrysalis has been hanging from one of the main entrance doors to our school here in Baltimore Maryland.  It is fascinating!  What is it?  Thank you in advance for your time and reply.
How you want your letter signed:  Nathan Glenn

Chrysalis of a Variegated Fritillary

Dear Nathan,
This beautiful chrysalis is that of a Variegated Fritillary,
Euptoieta claudia, which you may verify by comparing it to this BugGuide image.

What's That Bug? does not endorse extermination