Black Caterpillars: An Identification Guide to Common Species
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From the spiky peacock butterfly caterpillar to the drab black cutworm, there are lots of black or mostly black caterpillars out there. What kind have you found?
Ivicabrlic, CC BY-SA 4.0, via Wikimedia Commons
Black (and Mostly Black) Caterpillars
What kinds of caterpillars are black or mostly black in color? There are many, many dark-colored caterpillars out there. This quick and easy guide features some of the more common black caterpillars in North America and Eurasia. This guide will help you identify the dark-colored caterpillar you found.
For every species, this guide will tell you the common and scientific name. All insects have a scientific name, and many have a common or popular name. For example, the insect with the scientific name Spilosoma virginica is commonly known as "the yellow woolly bear."
This guide will also answer the following key questions:
- Does it sting? Some caterpillars have stinging hairs and spines and need to be handled very carefully.
- What does it eat? Every caterpillar has specific trees and plants that it eats.
- Will it seriously damage plants or trees? Most caterpillars do little to no damage, but a few pest species can really destroy a garden, or even a forest. A few species need to be reported to authorities to protect the local environment.
- Is it rare? The black caterpillar you found may be an unusual species!
- What does it turn into? Caterpillars are the immature form of butterflies and moths. Your dark-colored caterpillar will turn into some kind of winged adult, some of which are very beautiful.
- Can you raise it to an adult? It's possible to keep a caterpillar and raise it to the moth or butterfly. You will need to know what it eats and be patient while it grows and changes into the adult.
Look at the images here and see if the caterpillar matches the one you found. If it's not an exact match, try a Google search using the identification features as a starting point. Good luck!
Identification Chart to Identify Black Caterpillars
| Name | Identification | Habits |
|---|---|---|
Peacock | Spiny; black with white spots | European; feeds on nettles |
Giant leopard moth | Strong spines, red bands | Rolls up when threatened |
Mourning cloak | Spaines with red spots along back | Feeds on elm |
Pipevine swallowtail | Fleshy tentacles with some orange | Feeds on Aristolochia; possibly toxic |
Black cutworm | Flat black with few markings | Found during day in soil; feeds at night |
Garden tiger moth | Thick long hair, some white and orange | Feeds on low plants |
Azalea caterpillar | Speckled black with red and orange | Feeds in groups on azalea leaves |
Scarce dagger moth | Black with 12 striking yellow bumps on back | European species |
Walnut caterpillar | flat black long white hairs | Feeds in groups on walnut |
Banded woolly bear | Black with red on each end | wanders in late summer to find cocoon site |
Catalpa sphinx | Several forms; some all black with curved horn on end | Feeds on catalpa trees |
Tersa sphinx | Mostly gray-black with eyespots | Resembles a snake when stretched out |
White-lined sphinx | Some forms nearly black; red curved horn | Common and widespread species in US |
Black swallowtail | Immature forms are black with white "saddle" | Feeds on carrot, dill, and parsley |
Great spangled fritillary | Flat black with orange-based spines | Adult resembles monarch butterfly |
Red admiral | Black, spiny, white spots | Very common; adult flies around houses |
Black millipede | Shine, rounded, many small legs | Not a caterpillar; lives in leaf litter |
1. Peacock Butterfly (Aglais io)
This European butterfly is one of the most striking insects on earth. The caterpillar of this species is a rather plain black caterpillar armed with many spines. Despite the spines, this caterpillar is harmless and does not sting.
It feeds on nettles, and in the fall, it sheds its skin and turns into a chrysalis. The adult butterfly then hatches out of the chrysalis and flies off to mate and lay eggs, which completes the cycle.
The Basics
- Does it sting? No. These caterpillars are totally harmless.
- What does it eat? Nettles.
- Will it seriously damage plants or trees? No. It will eat some of the greens and leaves, but not very much.
- Is it rare? No, but they're hard to see on the plant.
- What does it turn into? A really gorgeous butterfly.
- Can you raise it to an adult? Yes, it's easy to raise this species. Make sure it has a stick in the container, because it makes its chrysalis on an upright stem.
2. Giant Leopard Moth (Hypercompe scribonia)
This is a large, black, spiny caterpillar. The spines are very sharp and stiff, almost like needles. When it feels threatened, the caterpillar rolls itself up into a ball with the spines sticking out. It also shows bright crimson bands between its body segments. Red and black are universal warning colors, and predators might well think that they're dealing with a wasp. If they do try to take a bite, all they will get is a mouthful of spines.
These beautiful moths, which are large and strikingly marked with black circles and iridescent blue spots, overwinter as full-grown caterpillars, usually under rocks, where you may find them curled up in the middle of winter. In the spring, they spin a cocoon from which the adults emerge in the summer.
The Basics
- Does it sting? No, but the spines are very stiff and sharp.
- What does it eat? Plantains, dandelions and violets.
- Will it seriously damage plants or trees? No. It will eat some of the greens and leaves, but not very much.
- Is it rare? No, but they are more common in the South.
- What does it turn into? A really gorgeous moth.
- Can you raise it to an adult? No, due to its overwintering habits.
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3. Mourning Cloak (Nymphalis antiopa)
The mourning cloak butterfly gets its name from the color of the butterfly's underside, which is a very somber shade of gray-brown. The butterfly's upper side, however, is stunning, with a rich maroon ground color, yellow wing margins, and deep violet spots. This butterfly sometimes overwinters and can be seen flying very early in spring.
The caterpillar eats elms and is sometimes known as "the spiny elm caterpillar." The black ground color is offset by red spots. The caterpillar has sharp black spines to deter predators.
The Basics
- Does it sting? No, the spines are just for show.
- What does it eat? Elms.
- Will it seriously damage plants or trees? Typically not an issue.
- Is it rare? No, except in England, where it is very rare.
- What does it turn into? A beautiful butterfly.
- Can you raise it to an adult? Yes.