12 Types of Caterpillars Found in North Carolina (And How to Identify Them)
September 10, 2026
Anyone who spends time in a North Carolina backyard, woodlot, or vegetable patch has probably crossed paths with a caterpillar without realizing what they were looking at. Identifying the many types of caterpillars in North Carolina matters more than most people think, since a fuzzy yellow larva on a hickory leaf and a striped green one on a milkweed stem can mean very different things for your skin, your garden, and the butterflies you’re hoping to attract.
North Carolina is home to nearly 3,000 species of caterpillars, and only about 3% of them are actually garden pests, according to NC State Extension’s Homegrown series. That leaves a huge number of harmless, even beneficial, larvae munching away in plain sight across the state’s three distinct ecoregions.
Those regions matter for identification. North Carolina spans roughly 156 documented caterpillar species across its Coastal Plain, Piedmont, and Blue Ridge ecoregions, and where a caterpillar turns up often narrows down what it is before you even look closely. This guide covers 12 of the most commonly encountered caterpillar species found across North America that show up regularly in North Carolina gardens, forests, and farm fields, and it fits into the state’s much larger world of insect diversity.
Pro Tip: Before reaching for a field guide, check three things first: whether the caterpillar has spines or hair, its color pattern, and what plant it’s sitting on. Combining those clues narrows most identifications down quickly.
| Caterpillar | Primary Host Plants | Sting or Rash Risk | Adult Insect |
|---|---|---|---|
| Monarch | Milkweed species | None | Monarch butterfly |
| Viceroy | Willow, poplar | None | Viceroy butterfly |
| Spicebush Swallowtail | Spicebush, sassafras | None | Spicebush swallowtail butterfly |
| Pipevine Swallowtail | Pipevine (Dutchman’s pipe) | None (toxic if eaten) | Pipevine swallowtail butterfly |
| Tomato Hornworm | Tomato, tobacco, pepper | None | Five-spotted hawk moth |
| Hickory Tussock Moth | Hickory, walnut, ash | Yes, itchy rash | Hickory tussock moth |
| Cankerworm | Elm, maple, oak | None | Cankerworm moth |
| Fall Webworm | Pecan, sourwood, persimmon | None | Fall webworm moth |
| Greenstriped Mapleworm | Maple, oak | None | Rosy maple moth |
| Redhumped Oakworm | Oak, elm | None | Redhumped oakworm moth |
| Saddled Prominent | Maple, beech | None | Saddled prominent moth |
| Uglynest Caterpillar | Wild cherry | None | Uglynest caterpillar moth |
1. Monarch Caterpillar
The monarch caterpillar (Danaus plexippus) is probably the single most recognizable larva in North Carolina, and for good reason. Monarch caterpillars feed exclusively on milkweed plants, which gives them their bold black, yellow, and white banding and, more importantly, their toxicity.
That striking coloring is not decoration. Monarch caterpillars are toxic to most animals, and this poison comes from their diet, which is almost entirely made up of milkweed, with toxins from the plant staying in the caterpillar and producing a bitter taste and poisonous effects. Anyone hoping to see these larvae in their yard has good odds if milkweed is nearby, since if you have milkweed in your yard or nearby, your chance of finding monarch caterpillars is excellent.
While common milkweed gets most of the attention, monarch caterpillars use a larger number of milkweed species as hosts than most people realize, including rush, sand vine, and whorled milkweeds. The adult that eventually emerges is one of the state’s most familiar butterflies found in North Carolina, making this species a favorite for gardeners planting for pollinators.
2. Viceroy Caterpillar
The viceroy caterpillar (Limenitis archippus) rewards a closer look because its adult form is a textbook example of mimicry. As a caterpillar, it looks quite different from the butterfly it becomes, but the adult viceroy is famous for closely resembling the monarch.
The viceroy has a black and yellow pattern on its head that makes it look a lot like a monarch, but the surest way to tell the two apart as adults is the underbelly, since the viceroy has white stripes where a monarch has black stripes. This mimicry is thought to give the viceroy an extra layer of predator protection by borrowing the monarch’s warning coloration, even though the viceroy caterpillar itself feeds on an entirely different set of plants than its milkweed-loving lookalike.
Viceroys are not unique to North Carolina. The species ranges widely through the eastern United States, showing up in similar numbers among the insects found in New York and reaching as far north as the caterpillar species documented in Maine. That broad range makes it one of the more reliable species for comparing caterpillar diversity across states.
3. Spicebush Swallowtail Caterpillar
Few caterpillars in North Carolina put on a better disguise than the spicebush swallowtail (Papilio troilus). Early in its life, this species does not look like much at all, which is exactly the point.
A newly hatched spicebush swallowtail caterpillar looks like a tiny white and brown slug curled inside a folded leaf corner, and while it is not very colorful, it shows how caterpillars can come in strikingly different shapes and sizes as they grow. As it matures, the transformation becomes dramatic.
Fully grown fifth-instar caterpillars reach up to 2 inches long, turning green with a pale yellow lateral line edged in black, blue dots ringed with black along the abdomen, and a pair of large tan false eyespots with a black pupil and white reflection that helps them mimic green snakes, tree frogs, or lizards. That snake mimicry is convincing enough that it can startle a person before they realize what they are looking at, an effect similar to how some of the region’s actual snakes native to North Carolina use bold coloring as a defense.
The caterpillars hide in leaf shelters during the day and come out at night to feed, so spotting one usually means gently unrolling a curled leaf on spicebush or sassafras rather than scanning open branches.
4. Pipevine Swallowtail Caterpillar
The pipevine swallowtail (Battus philenor) takes a completely different survival strategy than its swallowtail cousins. Instead of hiding or mimicking a predator, it advertises its toxicity outright.
According to Owlcation’s caterpillar identification guide, the pipevine swallowtail caterpillar is dark, velvety red-brown to black with fleshy orange tubercles, and it feeds on pipevines while packing a chemical punch that makes both the caterpillar and butterfly distasteful to predators. That chemical defense comes directly from its host plant.
This strikingly dark caterpillar, ranging from deep reddish-brown to near-black with rows of fleshy orange tubercles along its back, feeds exclusively on pipevine plants and sequesters toxic aristolochic acids from its host, rendering both caterpillar and adult highly toxic to vertebrate predators. The toxicity is so effective that several other butterfly species, including the spicebush and black swallowtail, mimic the adult pipevine swallowtail’s appearance in a classic example of Batesian mimicry. Finding this species usually means locating pipevine or Dutchman’s pipe growing in woodland edges.
5. Tomato Hornworm
Gardeners tend to meet the tomato hornworm (Manduca quinquemaculata) the hard way, discovering half a tomato plant stripped bare overnight. This is one of the few species on this list that regularly earns pest status.
Tomato hornworms are closely related to the tobacco hornworm and are identified by eight V-shaped markings along their bodies, inhabiting plants in the nightshade family and reaching a length of about 3.5 inches. That size, combined with a green body and diagonal white stripes, makes them surprisingly easy to spot once a gardener knows what to look for, though their color often blends in against tomato foliage until the damage is already done.
Left alone, tomato hornworms rarely need pesticide intervention. According to the University of Missouri Extension’s guide to garden caterpillars, gardeners can often manage populations by hand-picking or by encouraging natural predators. Parasitic wasps found throughout North Carolina lay eggs directly on hornworms, and a caterpillar covered in small white cocoons has already been dealt with by nature. Ladybugs and other beneficial garden insects round out a garden’s natural pest control without a single spray.
Common Mistake: Killing a tomato hornworm covered in small white, rice-like cocoons actually stops beneficial parasitic wasps from completing their life cycle. Leave parasitized hornworms in place so the wasps can finish the job.
6. Hickory Tussock Moth Caterpillar
This is one of the few caterpillars on this list worth handling with actual caution. The hickory tussock moth caterpillar is covered in dense white and black hair tufts that look almost inviting to touch, which is exactly the problem.
The hickory tussock moth caterpillar is one of the species known to cause skin reactions ranging from sharp burning pain to hours-long irritation. According to WALTER Magazine’s guide to stinging caterpillars of North Carolina, contact with the hairs of species like this can cause reactions that persist well after the initial contact, and stinging caterpillars overall are not especially common in the region, so an encounter is more surprising than routine.
Reactions vary widely from person to person, and some people barely notice contact while others develop welts. Anyone curious about the state’s other stinging insects found in North Carolina will find the hickory tussock sits in an unusual middle ground, since it is a caterpillar rather than a true stinging insect, but its urticating hairs deliver a similar irritant effect.
Important Note: The hickory tussock moth caterpillar’s hairs are not venomous in the way a bee sting is, but they can trigger allergic skin reactions. Avoid direct contact and wash the area with soap and water if you touch one by accident.
7. Cankerworm
Cankerworms are inchworm-style larvae that show up on hardwood trees in early spring, and North Carolina actually has two versions: spring and fall cankerworms, named for when the adult moths emerge rather than when the caterpillars feed.
NC State Extension’s insect notes on woody plant pests list the caterpillars that feed on trees and shrubs in North Carolina, and note that cankerworms feed on elm, maple, oak, and similar hardwood species. In heavy years, entire tree canopies can look thin and lacy by late spring as the tiny green or brown larvae strip young leaves.
Cankerworm outbreaks tend to be cyclical rather than constant, and natural predators help keep numbers in check between peak years. Woodland birds, including several owl species native to North Carolina, feed on the moths and larvae, contributing to the natural boom-and-bust pattern that keeps most infestations from becoming permanent problems.
8. Fall Webworm
The fall webworm is easy to spot even from a distance, thanks to the loose, dirty-looking silk tents it spins around the tips of tree branches in late summer and fall. Unlike the tighter, denser nests of eastern tent caterpillars in spring, fall webworm nests appear later in the season and enclose the leaves the caterpillars are actively eating.
According to NC State Extension’s list of tree and shrub pests, fall webworms commonly feed on pecan, sourwood, and persimmon trees, among others. The caterpillars stay inside their communal web as they feed, enlarging the structure as they grow and consume more foliage, which is why the nests seem to expand dramatically over just a few weeks.
Despite how alarming a large webworm nest can look on an ornamental tree, the damage is rarely fatal to an established, healthy tree. The larvae and their webs also provide a food source for various woodland predators, including several frog species found across North Carolina that pick off caterpillars that wander or fall from the nest.
9. Greenstriped Mapleworm
The greenstriped mapleworm (Dryocampa rubicunda) is the larval stage of one of the most colorful moths in the state, the rosy maple moth, and the caterpillar itself is worth knowing on its own merits.
NC State Extension notes that the greenstriped mapleworm feeds primarily on maple and oak, and it is commonly reported on ornamental maple and oak plantings across the state. The caterpillar itself is pale green with darker longitudinal stripes running the length of its body, blending in surprisingly well against maple foliage until numbers build up enough to cause visible thinning.
Population booms tend to happen in cycles tied to weather and predator numbers rather than occurring every year in the same location. Gardeners who want to track which moths are turning up locally alongside this species can compare notes using a broader guide to moths documented in North Carolina.
10. Redhumped Oakworm
The redhumped oakworm (Symmerista canicosta) gets its name from the reddish bump near the front of its body, a small but distinctive marker that separates it from similar-looking oak-feeding caterpillars.
Redhumped oakworms feed on oak and elm, according to NC State Extension’s roundup of caterpillars affecting trees and shrubs in the state. Groups of these caterpillars often feed together on the same branch, and coordinated group feeding can strip a section of foliage quickly even though the overall damage to a mature, healthy tree tends to be cosmetic rather than lasting.
Oak-feeding insects are common enough in North Carolina that gardeners managing landscape trees often deal with several species at once. Comparing a suspected redhumped oakworm against the broader range of beetles found in North Carolina that also feed on oak foliage can help rule out look-alikes before assuming which pest is actually present.
11. Saddled Prominent
The saddled prominent (Heterocampa guttivitta) is another hardwood defoliator that periodically draws attention during outbreak years, particularly in forested parts of the Piedmont and mountain regions.
NC State Extension’s insect note on tree and shrub caterpillars lists the saddled prominent as a species that feeds on maple and beech, two of the state’s most common hardwood species. The caterpillar’s name comes from a distinctive saddle-shaped marking along its back, which helps separate it from other green, humped larvae found on the same host trees.
Like several other native defoliators on this list, saddled prominent populations rise and fall in multi-year cycles rather than staying at damaging levels continuously. Most years, the species goes almost unnoticed, quietly completing its life cycle on beech and maple leaves without drawing much attention from homeowners or foresters.
12. Uglynest Caterpillar
The uglynest caterpillar earns its unflattering name honestly. This species builds a messy, silk-wrapped nest of leaves and twigs on wild cherry trees that looks nothing like the neat webs of other communal caterpillars.
Uglynest caterpillars feed primarily on cherry trees, according to NC State Extension, and their construction method is distinctive. These caterpillars build a shelter for themselves within the host plant by joining two ends of leaves together with silk, which contracts as it dries and pulls the leaf edges tight. The result is a tangled, unkempt-looking structure that gives the species its common name.
Wild cherry trees hosting an uglynest colony often also support a wider web of pollinators and beneficial insects nearby, since flowering cherry attracts a steady stream of visiting bee species found throughout North Carolina. As with most caterpillars on this list, an uglynest colony rarely threatens a mature tree’s long-term health, even though the nest itself looks far worse than the actual damage underneath.
Key Insight: Most of the defoliating caterpillars covered here, including cankerworms, fall webworms, and uglynest caterpillars, cause cosmetic damage that healthy trees recover from within a season. Chemical treatment is rarely necessary unless an outbreak is severe and repeated for multiple years running.
North Carolina’s caterpillars range from toxic milkweed specialists to communal nest-builders, and each species tells a different story about the plants and habitats it depends on. Learning to recognize a handful of common types of caterpillars in North Carolina, from the monarch’s warning stripes to the hickory tussock’s irritating hairs, turns a random backyard sighting into a genuinely interesting piece of natural history. For readers who want to keep exploring the state’s larger caterpillar population beyond these 12 species, a broader guide to caterpillar species across North Carolina covers even more varieties worth watching for throughout the growing season.