Currently viewing the category: "moth caterpillars"
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Caterpillar emergence
Location: Pittsburgh, PA
May 15, 2011 9:35 am
I need to know the emergence dates of the following moth species. They have been stored in my garage since last fall. All but the Polyphemus were hand-reared. I live in Pittsburgh, PA. The moths are Promethea, Royal Walnut and Polyphemus. Thanks!
Signature: June

Hickory Horned Devil: early instar

Dear June,
We don’t believe we can predict with accuracy the exact emergence dates for the Giant Silkmoths you have listed because emergence is not something that can be calculated by counting days, weeks or months.  Temperature and other climactic conditions are significant factors.  However, we can use historical sighting information on adults of the species to try to predict emergence dates.  Since Giant Silkmoths don’t feed as adults, their average longevity would be about a week, during which time they mate and reproduce, if they are lucky, though many individuals provide food for other creatures and never manage to mate.  One of our favorite yearly activities involves tracking the northern emergence patterns of the Luna Moth which began in Texas in late February this year.  Our most northern reports thus far this year have been from Virginia and Iowa, and we expect to begin hearing from Main and possibly Canada by late May or early June.  Later in the year, reports of a second brood will come again from the southernmost portions of the range in Texas and Florida
We don’t really track the other Giant Silkmoths the way we do the Luna Moth.  Starting with the Promethea Moth, according to BugGuide:  “One brooad flies June to July northward. Two broods southward, flying March to May and July to August.”  The data page on BugGuide with information on sighting in specific states has sightings in March, June and July in Ohio and May and July in Pennsylvania.  The March sighting might have been a cocoon since various stages of the metamorphosis are not aggregated in the data presentation.  We would predict a June hatching for your moths.  Regarding the Royal Walnut Moth or Regal Moth, the adult of the Hickory Horned Devil you have provided as an illustration, BugGuide indicates:  “Adults fly from late May to September” however, that is information spread out over the entire range.    The data page on the Regal Moth on BugGuide indicates sightings from June through September in Pennsylvania and July and August for Ohio, but that information would include adults and caterpillars, and we always get Hickory Horned Devil sightings in September.  Our best guess is that you can expect emergence of the Royal Walnut Moth from the pupa in June, or possibly as late as July.  Regarding the Polyphemus Moth, BugGuide indicates:  “In southern United States, adults fly April-May and July-August (2 broods); in northern part of range, adults fly from May to July (1 brood).”  According to the data page, sightings in Ohio run March to September exempting May and those for Pennsylvania are from May to August.  Based on that information, we might expect your Polyphemus Moths to hatch the soonest, possibly beginning now and into June.

Thanks, Daniel!  I have been successful in the past with the Promethea as far as mating and collecting eggs.  I would like to try the same with the other moth species.  I’m thinking it might be best for me to attach the cocoons to the inside of the metal hardware cloth cage that I have used for the Promethea and wait to see when each emerges.
Thanks for your efforts in researching my questions.  I appreciate it very much.

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Name that bug?
Location: Perth, Western Australia
May 13, 2011 3:50 am
We have passed this around our office (staff of over a hundred), and no one has been able to identify.
Please help us!!
Signature: Unknown

Vine Hawkmoth Caterpillar

Dear Unknown,
We quickly identified your caterpillar as
Hippotion celerio on the Butterfly House website devoted to the Lepidoptera of Australia.  It is commonly called a Gabi Moth or Vine Hawkmoth.  The Butterfly House website indicates:  “This Caterpillar occurs world-wide. It can occur in several different colour forms: green, brown, red or dark grey. It usually has an eyespot each side of the first and second abdominal segments, those on the first segment being larger. There are variable cryptic stripes and bands along the rest of the body. The Caterpillar has a tailhorn curved slightly backwards which tapers to a point.”  This is actually an Old World species and it is not found in North America or South America.  According to the Sphingidae of the Western Palaearctic website, it is described as:  “A notable migrant in most years from tropical Africa and India to the western Palaearctic region. In warm years, new colonies may even be established in North Africa and Europe, so the delineation between resident and migrant ranges cannot be clearly defined. It is, however, resident in the Canary Islands, and probably also in the Azores and along the Atlantic coast of Morocco. It is certainly resident in many areas of the Levant and the Arabian Peninsula (Pittaway, 1979b), and Egypt (Badr et al., 1985).  Extra-limital range. Tropical Africa, Asia and Australia, with occasional records from northern New Zealand.”  The caterpillar in your photo is reacting as though it was threatened based on this information on the Sphingidae of the Western Palaearctic website:  “As with most larvae exhibiting anterior eye-spots, the head is retracted when the larva is alarmed, expanding the large eye-spots on the first abdominal segment. When feeding, it rarely consumes the whole of a leaf; shoots with quarter- or half-eaten leaves often indicate the presence of a larva. Whereas young larvae may be found beneath a leaf, fully-grown specimens usually rest away from the feeding area, farther down the stem.”  This species is known to feed on grape as well as numerous other plants.

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never seen creature
Location: Melbourne, Australia
May 9, 2011 8:12 am
I never seen this creature in my life. I found its family in load of my mulch. It do not have any feet but moves very slowly.
Signature: Bob

Sphinx Moth Pupa: Agrius convolvuli

Dear Bob,
You have unearthed the Pupa of a Sphinx Moth in the family Sphingidae.  This is a large family with a global distribution and there are 65 species listed on the Sphingidae of Australia web page.  All of the species have pupae with a similar morphology and we are uncertain of the exact species you have found.  Each species has a different food plant or plants, and knowing what plants were growing in the vicinity of the mulching in your garden, or in the vicinity where the load of mulch was produced before its delivery to your home might facilitate the identification process.  You did not provide information on the load of mulch.  Was it newly delivered?  Though there are subtle differences in the anatomy of the various species of Sphinx Moth Pupae, they do share enough general traits to ascertain at least a family identification.  The shape of a Sphinx Moth Pupa has often been described as looking like a jug with a handle.  The handle is actually the case for the proboscis, the long tubular mouthparts that are used to sip nectar from blossoms much the way we humans drink from a straw.  Sphinx Moths have among the longest proboscises in the insect world, and the organ is coiled when not in use, and when extended during feeding it may be several inches long.  The current record for the longest proboscis is held by Morgan’s Sphinx Moth,
Xanthopan morganii, a species from Madagascar which was hypothesized to exist many years before its discovery there.  The Morgan’s Sphinx Moth has a nearly foot long proboscis, and when Charles Darwin was presented a Madagascar Orchid with a long nectary, he is reported to have written in a letter: “I have just received…a Box…from Mr Bateman with the astounding Angræcum sesquipedalia with a nectary a foot long— Good Heavens what insect can suck it”?  Curious readers may read about the evolutionary theories of Alfred Russel Wallace who supported Darwin’s initial claim by visiting the Alfred Russel Wallace website.  The casing for the proboscis in the pupae of Sphinx Moths is shorter than the actual organ, and it would be curious to know how it actually forms during the metamorphosis process.  You may decide to do additional research if your query demands a species identification for your Sphinx Moth Pupa and we would also entertain the possibility that one of our readers might be able to provide information on the actual identity of this Sphinx Moth Pupa.

Thanks to a comment from Bostjan Dvorak, we now know that this is
Agrius convolvuli, the Convolvulus Hawkmoth.  Here is a page from the Sphingidae of Australia website.

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Location: Rio Napr Ecuador
May 6, 2011 6:53 pm
I have a photo of a caterpillar taken in the rio nape region of ecuador and would like to no the species please
Many thanks
Signature: Mark Whittaker

Fig Sphinx Caterpillar

Hi Mark,
This gargantuan caterpillar is a Fig Sphinx Caterpillar,
Pachylia ficus, and it ranges from the southern portions of the U.S. into South America.  The color pattern is quite distinctive, but the species is quite variable and there are also brown and green morphs which you may see in our archives as well as on the wonderful Sphingidae of the Americas website.

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Location: South Africa – Gauteng province
May 3, 2011 3:14 am
hi bugman – can you id this caterpillar?
Signature: Wes

Death's Head Hawkmoth Caterpillar

Dear Wes,
This magnificent caterpillar is a Death’s Head Hawkmoth Caterpillar,
Acherontia atropos.  You may see a photo of an adult moth in our archive which will explain the common name.  This species has the notoriety of figuring prominently in the poster for the award winning film Silence of the Lambs.

What's That Bug? does not endorse extermination

Unidentified caterpillar
Location: Los Altos, CA (South San Francisco bay area)
May 1, 2011 10:53 pm
We saw this guy today (May 1, 2011) at a park in Los Altos California. The pic was taken about 7:30pm and it was about 75 degrees F. It was crawling on an artificial rock play climbing structure on the playground. Can you help us identify it?
Signature: Rolf F

Western Tussock Moth Caterpillar

Hi Rolf,
Your Western Tussock Moth Caterpillar,
Orgyia vetusta, shares many similar characteristics with its close relatives in the genus.  BugGuide only reports this species from California, though its relatives including the White Marked Tussock Moth, Orgyia leucostigma, are found throughout North America.  You should handle the Western Tussock Moth Caterpillar and its relatives with caution because BugGuide notes:  “Contact with hairs may cause an allergic reaction.

What's That Bug? does not endorse extermination