12 Weird (but COMMON) Caterpillars in Colorado! (ID Guide) (2023)

What kinds of caterpillars can you find in Colorado?

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Caterpillars are some of the MOST fascinating insects in the world! It always amazes me that caterpillars eventually turn into butterflies or moths.

There are hundreds of different caterpillar species found in Colorado!

Since it would be impossible to list them all in one article, I chose the 12 most interesting and common ones to share with you. 🙂

#1. Monarch Caterpillar

  • Danaus plexippus

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Identifying Characteristics:

  • This famous caterpillar is plump with black, white, and yellow bands.
  • Its legs and pro-legs are pronounced, and each end of its body has spindly black tentacles.
  • The Monarch’s preferred host plant is milkweed.

Like the adult butterfly, the Monarch is one of the most well-recognized caterpillars in Colorado!

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Their distinctive stripes and tentacles make them look cartoonish. But this highly visible coloring sends a message to predators: Back Off!

Monarch Caterpillars are toxic to most animals, and at the very least, taste bad! This poison comes from their diet, which is almost entirely made up of milkweed. Toxins from the milkweed plant stay in the caterpillar, producing a bitter taste and poisonous effects.

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If you have milkweed in your yard or nearby, your chance of finding Monarch Caterpillars is excellent! Honestly, there is nothing more fun than finding these colorful insects on our milkweed plants and getting to watch them transform into adults!

#2. Cabbageworm

  • Pieris rapae

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Identifying Characteristics:

  • Coloring is light green with small yellow dots along the sides.
  • This species is small and relatively thin and appears velvety.
  • Cabbageworms’ host plants are Brassicas, including cabbage, kale, broccoli, and chard.

In Colorado, this species is often called the Imported Cabbageworm because it isn’t native to North America. It was introduced in shipments of cabbage and other brassica plants and soon became an invasive species.

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Cabbageworms are considered agricultural pests and can do severe damage to crops to their host plants. Cabbage, brussels sprouts, broccoli, and cauliflower are all susceptible to damage. For a home gardener, the best way to deal with Cabbageworms is to prevent a large infestation. Plant covers, regular weeding, and varied plantings can all help with preventing this hungry invader!

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One reason Cabbageworms are so damaging is that they are voracious eaters! They can easily skeletonize entire plants, eating everything but the toughest stems and midveins. Boring through heads of cabbage and making huge dents in broccoli are no problem for this Very Hungry Caterpillar!

Cabbageworms grow into Cabbage White Butterflies, which are one of the most abundant butterflies in Colorado! If you see a white butterfly in the spring, chances are it’s a Cabbage White!

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#3. Woolly Bear

  • Pyrrharctia isabella

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Identifying Characteristics:

  • Coloring is black with a wide rusty-red band in the middle.
  • As its name suggests, the Woolly Bear caterpillar is covered in dense, coarse hairs.
  • Transform into Isabella Tiger Moths.
  • Woolly Bears are generalist feeders, meaning they will live on and eat nearly any plant!

As a kid, I can remember hearing tons of stories about Woolly Bear caterpillars – and the coolest part about them is that most of the stories are true! One myth you might have heard is that Woolly Bears can predict the type of winter we’ll have. Unfortunately, this one isn’t true. But there’s plenty of other interesting facts about this cute little caterpillar!

The most fascinating thing about Woolly Bears is the way they hibernate.

That’s to say, they don’t hibernate at all! Instead of burrowing or pupating to escape the cold, Woolly Bears allow themselves to freeze solid. They have a unique chemical in their blood that allows them to thaw out and continue in the spring as if nothing happened!

You may have heard that Woolly Bear Caterpillars are venomous, but this isn’t entirely true. Their hairs don’t contain any toxins or irritants, but some people are sensitive to the hairs and may get a slight rash if they touch one. It’s best to observe the species without touching them, just in case.

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Woolly Bear Caterpillars and their adult-form, Isabella Tiger Moths, are found in incredibly varied climates, even the Arctic! Because they will eat almost anything, including herbs, tree leaves, and grasses, they can be found pretty much anywhere plants are growing. Look for them in groups near the base of plants.

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Just don’t expect them to take over for your meteorologist! 🙂

#4. Viceroy Caterpillar

  • Limenitis archippus

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Identifying Characteristics:

  • The coloring is mottled brown or green and white to resemble bird droppings.
  • Two dark-colored horns on the head and small spines on the body.
  • The chrysalis also resembles bird droppings hanging from a tree branch.
  • The preferred host plants of Viceroy Caterpillars are willow, poplar, and cottonwood trees.

Viceroy Caterpillars are one of the ugliest caterpillars in Colorado!

This is by design; their lumpy, mottled appearance makes them look like bird droppings, warding off predators!

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Interestingly, this isn’t the Viceroy’s only protection against predators. Viceroy Caterpillars eat plants that are rich in salicylic acid, which they store in their bodies. When predators try to eat them, they are rewarded with a strong, bitter flavor and an upset stomach. One taste and they learn to stay away!

Viceroy Caterpillars primarily live in open forests or fields, and they’re found across many different climates. Look for them during spring and summer, which is when the adults typically mate.

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Interestingly, Viceroy and Monarch Caterpillars look almost identical.

#5. Large Maple Spanworm

  • Prochoerodes lineola

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Identifying Characteristics:

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  • Gray-brown coloring with small black spots scattered on the body. Often this species has a bark-like pattern.
  • Thin and stick-like with a knob on each end.
  • Large Maple Spanworms use a huge variety of plants and trees as hosts: birch, maple, cherry, apple, oak, poplar, walnut, and willow trees; geranium, soybean, blueberry, and currant plants; and grass.

This species has one of the best camouflages of any caterpillar in Colorado!

Large Maple Spanworms look exactly like a bit of twig on a tree, even from up close! So, it’s hard to imagine any predator observant enough to try and eat one, which is precisely its goal.

Their camouflage is the only defense Maple Spanworms have because they aren’t poisonous. They’re a favorite snack for determined birds!

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When they’re not imitating sticks, Large Maple Spanworms have an interesting way of getting around! They plant their front legs, arch their back in the air, and bring their back legs forward to meet their front. Then, they throw their front forward and repeat the whole process. They’re one of many caterpillars that move like this, earning them nicknames like inchworm, looper, or spanworm.

Large Maple Spanworm Moths are just as adept at camouflage as their larva – they look exactly like dead leaves clinging to a branch!

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#6. Variegated Fritillary Caterpillar

  • Euptoieta claudia

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Identifying Characteristics:

  • Stripes of black, red, and white run the length of the body.
  • Black branched spines stick out from each body segment in even rows.
  • Variegated Fritillaries will use any plant in the violet or alder family as a host plant. These include common blue violets, yellow alder, and pansies.

Variegated Fritillary Caterpillars share the same name as their adult-form butterflies. They eat ornamental plants like violets, pansies, and passionflower.

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Look for these caterpillars in Colorado in meadows, open lots, and fields.

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The Variegated Fritillary’s chrysalis is the most beautiful of all the caterpillars in Colorado. This protective shell is where the caterpillar transforms into the adult butterfly. Its pearly white color and shiny gold spikes make it look like an expensive jeweled pendant!

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#7. Curve-Lined Owlet Moth Caterpillar

  • Phyprosopus callitrichoides

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Identifying Characteristics:

  • The coloring is shades of brown and cream, occasionally near black.
  • The distinctive body shape is spiky, contorted, and asymmetrical, like a dry leaf.
  • Greenbriers are the host plant of choice for this species.

There’s a good chance you’ve seen a Curve-Lined Owlet Caterpillar in northeastern Colorado!

However, you may not have even realized it because this species is an expert at camouflage. Its body is meant to look like a dry, curled leaf clinging to a branch. I think it succeeded!

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Interestingly, it isn’t only the larva of this species that hide in plain sight. Curve-Lined Owlet Moths also have coloring and texture that resembles a dry leaf. So, it seems like even though the insect goes through a complete metamorphosis, it keeps some of the survival traits into adulthood!

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The host plant of the Curve-Lined Owlet Caterpillar is greenbrier, a vine plant common in many habitats. This species prefers woodland and nearby clearings, but it’s sometimes spotted in more developed areas like office parks or lush backyard gardens.

#8. Milkweed Tussock Caterpillar

  • Euchaetes egle

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Identifying Characteristics:

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  • Tufts of black and white hairs cover the body, with one line of black-centered orange tufts along the back.
  • The body is relatively thin and up to 1.5 inches long.
  • As its name suggests, this species’ preferred host is Milkweed.

Despite looking very different, Milkweed Tussock Caterpillars in Colorado have a lot in common with Monarch caterpillars!

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Milkweeds are the preferred host plant for both species. However, the really interesting thing about them isn’t what they eat; it’s why! Milkweed Tussock Caterpillars store a poisonous chemical from milkweed called cardiac glycoside in their body.

It doesn’t harm the caterpillar, but it does an effective job of making the caterpillar both disgusting and dangerous for many predators! In fact, Blue Jays have been known to vomit after eating just one of these furry little caterpillars.

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The fascinating thing about cardiac glycoside is it stays in the caterpillar’s body through its transformation into a moth. So, even though Milkweed Tussock Moths don’t eat milkweed, they still have the benefits that the caterpillar’s diet created!

#9. Parsley Caterpillar (Black Swallowtail)

  • Papilio polyxenes

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Identifying Characteristics:

  • The coloring is bright green, with rings of black and yellow dots down the length of the body.
  • The head and thorax are slightly larger than the back, and the legs and pro-legs are pronounced and visible even from a distance.
  • Parsley plants are the preferred host of this species.

Parsley Caterpillars, sometimes called parsley worms, are the larva of the Black Swallowtail butterfly. They get their name from their preferred host and favorite snack, the parsley plant.

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At first glance, it’s easy to mistake a Parsley Caterpillar for a Monarch. But, the coloring is slightly different, and the stripes on the Monarch Caterpillar are a bit thinner. It would also be unusual for a Monarch Caterpillar to eat parsley or other garden herbs since they eat milkweed almost exclusively!

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If you’re a gardener, you might consider Parsley Caterpillars a bit of a nuisance since they can decimate a parsley plant quickly. But, if you plant some extra, you’ll be rewarded with sightings of the beautiful Black Swallowtail butterfly in a few weeks!

#10. Eastern Tiger Swallowtail Caterpillar

  • Papilio glaucus

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Identifying Characteristics:

  • The coloring is bright green with two large eyespots in white, black, and blue.
  • The thorax is much larger than the middle and tail, giving the caterpillar the look of an enlarged head.
  • The favorite host plants of this species are the tulip tree and wild black cherry.

This species is one of the strangest-looking caterpillars in northeastern Colorado!

The appearance of Eastern Tiger Swallowtail Caterpillars is so unique they inspired a Pokemon! Caterpie (the Pokemon) has the same features, including its horn-like Osmeterium, bulbous thorax, and large round eyespots. I consider this to be quite an honor! 🙂

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This caterpillar’s primary defense is mimicry, using its unique shape and coloring to imitate a snake’s head. Additionally, as a young caterpillar, its color is brown and white to mimic bird droppings!

Interestingly, the adult Eastern Tiger Swallowtail Butterfly stands out in a crowd with its unique coloring and pattern.

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Another defense of the Eastern Tiger Swallowtail is its Osmeterium, a horn-like organ that can be projected from the caterpillar’s head. Its dual functions are to mimic a snake’s forked tongue and to smell horrible to predators! Interestingly, to humans, the odor is strong but pleasant, like grass and pineapple!

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#11. Cecropia Moth Caterpillar

  • Hyalophora cecropia

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Identifying Characteristics:

  • The coloring of this species changes with each instar growth. Most commonly seen in late instar; green with yellow, blue, and red bumps topped with black spikes.
  • It has a large, fleshy body and very obvious leg appendages.
  • Cecropia Caterpillars prefer birch, cherry, and maple trees for host plants.

Cecropia Caterpillars look more like aliens than anything!

Their bulbous bodies and multicolored, spiked nodules truly look like something from a sci-fi movie.

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Look for Cecropia Caterpillars on maple, birch, and apple trees during late spring. They remain in their caterpillar stage for about two weeks before encasing themselves in their chrysalis for winter.

This species is one of many caterpillars in Colorado called a “silkworm”. The name refers to the silk cocoon they spin around their chrysalis in preparation to become a moth. The cocoons are brown and cling to the side of host plants, and look like dead leaves.

As strange as Cecropia Caterpillars look, it’s nothing compared to the adult Cecropia Moth. Not only is the pattern and coloring beautiful, but this moth is also ENORMOUS! In fact, it’s the largest moth in North America!

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#12. Io Caterpillar

  • Automeris io

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Identifying Characteristics:

  • The coloring is green with two stripes along each side, one red and one white.
  • Tufts of short green spines cover the body, with patches of light green showing through.
  • Io Caterpillars use hackberry and willow trees as host plants.

Io Caterpillars are highly venomous, and their sting is excruciating!

Fortunately, the sting is rarely severe enough to seek medical attention. Instead, most experts recommend removing the spines with scotch tape, then applying ice to the sting. Over-the-counter antihistamines and pain relievers can also help.

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Of course, the best way to stay safe is to avoid touching Io Caterpillars. Since they’re so recognizable, this should be pretty easy!

Their tufts of green spines are distinctive and hard to miss against darker green leaves or brown bark. The red and white stripes on the sides are also helpful – they clearly say, “Stay back, I’m dangerous!”

If you know you’re going to be gardening or doing yard work in an area with Io Moths or their caterpillars, it’s a good idea to wear a hat and gloves. That way, if you happen to brush against one, you won’t have to worry about exposed skin!

Adult Io Moths are just as distinctive as their larva – if not more so! They have a beautiful pattern with large, prominent eyespots. There are two color morphs:

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Do you need more help identifying caterpillars in Colorado?

Here are some recommended books on Amazon!

Which of these caterpillars have you seen in Colorado?

Leave a comment below!

If you enjoy this article, make sure to check out these other guides!

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How can I identify this caterpillar? ›

To identify a caterpillar, start by examining the color of its body and any markings that it has. Then, note the density of the tiny hairs on its body, and look for any distinct physical features, like head horns, spines, or a curled tail.

Is there an app to identify caterpillars? ›

Monarch SOS is an awesome butterfly, caterpillar and milkweed identification guide suitable for all ages. The app includes similar species often mistaken for monarch butterflies, chrysalises, caterpillars and eggs, as well monarch larva instar stage identification.

What looks like a caterpillar but isn t? ›

Sawfly larvae look an awful lot like true caterpillars (which turn into moths or butterflies), but these creatures are actually related to ants, bees and wasps. In contrast, adult sawflies have a distinct wasp-like appearance which hints at the true evolutionary relationships of these creatures.

Are there any poisonous caterpillars in Colorado? ›

These spines and quills inject a poison that causes a painful sting that persists for hours, sometimes into the following day. My colleague Deane Bowers, an entomologist, identified the caterpillars to the genus Hemileuca, the buck moths. At least three buck moth species are native to Colorado.

What does a sawfly caterpillar look like? ›

Aruncus sawfly has pale green caterpillar-like larva that reach 20 mm in length and eat the leaves of Aruncus plants. The adult is a winged insect, 5-6 mm long with a yellowish abdomen and darker head and thorax. The wings are clear with brown veination.

What does a Julia caterpillar look like? ›

Caterpillars are black and white with orange and black heads. When a caterpillar has eaten so much of the host plant that it cannot find shade and is in full sun, it will be much lighter in appearance. Caterpillars have long bristles.

What does a woolly bear caterpillar look like? ›

In terms of appearance, the caterpillar has 13 distinct segments of either rusty brown or black. Often, it is black on both ends with rust-colored segments in the middle, although it may sometimes be mostly black or mostly rust. (Note: All-black, all-white, or yellow woolly caterpillars are not woolly bears!

Is there an app that will tell me what something is? ›

With CamFind, understanding the world around you has never been easier. Simply take a picture of any object and CamFind uses mobile visual search technology to tell you what it is. The CamFind app provides fast, accurate results with no typing necessary. Snap a picture, learn more.

What looks similar to a caterpillar? ›

Sawflies are a group of flies, whose larvae look very similar to moth and butterfly caterpillars. The larvae are usually 1-4 cm long, but come in an impressive variety of colours.

What are those furry caterpillars? ›

A fluffy caterpillar is one of the most venomous caterpillars in the United States. The puss caterpillar (Megalopyge opercularis) has hidden toxic spines underneath its fur.

What is the most common poisonous caterpillar? ›

The bag shelter caterpillar (Ochrogaster lunifer) is without doubt the most toxic caterpillar on our list. These fuzzy beauties, like the others in this group, are covered in urticating hairs that release venom when touched.

What is the most toxic caterpillar? ›

The caterpillar has been responsible for many human deaths, especially in southern Brazil. Its venom has been the subject of numerous medical studies. The species was first described by Francis Walker in 1855. Guinness World Records classified the Lonomia obliqua as the most venomous caterpillar in the world.

Are fuzzy caterpillars in Colorado poisonous? ›

You may have heard that Woolly Bear Caterpillars are venomous, but this isn't entirely true. Their hairs don't contain any toxins or irritants, but some people are sensitive to the hairs and may get a slight rash if they touch one. It's best to observe the species without touching them, just in case.

How do you tell a caterpillar from a sawfly larvae? ›

Sawfly larvae have six or more pairs of prolegs and no crochets. The adults look similar to wasps. Caterpillars have five or fewer pair of prolegs (fleshy outpouchings of tissue on the abdomen) and hooks called crochets at the base of the prolegs The adults are butterflies or moths.

How do I identify a sawfly? ›

Sawflies have six pairs of prolegs or more. The prolegs on slug sawflies are small and may be overlooked. Sawfly larvae are smooth with little or no hair and are no more than one inch long when fully grown. Moth and butterfly caterpillars can be smooth, hairy or spiny, and vary in size when mature.

What is the difference between sawfly larvae and caterpillars? ›

Sawfly caterpillar (larva) identification guide

Although, on smaller caterpillars this can be difficult. Sawfly caterpillars have three true legs at the front, the same number as many other insect larvae, but have more 'stumpy' prolegs, five or more, extending down the abdomen.

What does a viceroy caterpillar look like? ›

It is dark orange with black veins. A row of white spots edge its wings. Its color and pattern mimics the monarch butterfly's pattern, except for a black horizontal stripe that crosses the bottom of its back wings. The viceroy caterpillar is white and olive-brown.

What does a hawkmoth caterpillar look like? ›

A thick, brown caterpillar with a small, stubby horn at the tail. The elephant hawk-moth gets its name from the trunk-like head which retracts and extends from its bulbous neck. When threatened it swells its neck, making its four large eye spots more prominent. Some forms can be bright green.

What does a Ulysses caterpillar look like? ›

Initially, they are yellowish-green in color. There is a pair of spikes on each segment on the back. There is a black mark around the middle section. Older caterpillars are white and green, keeping them well-camouflaged in the leaves of their host plants.

What kind of caterpillar is black and brown and fuzzy? ›

Habitat: The Woolly Bear (aka Banded Woolly Bear) can be found in The United States, Southern Canada, and Mexico. They are caterpillars of the Isabella Tiger Moth. The caterpillars have fuzzy looking bristles that are black on both ends and reddish brown in the middle.

What happens if you touch a wooly worm? ›

Woolly bear caterpillars lack stinging spines and do not bite. However, the hairs can easily break off into skin when touched, which will cause pain and irritation.

What does the Woolly Worm say about winter 2022? ›

2022-2023 Woolly Bear Winter Prediction

So, this year the beginning will be worse, the middle not as mild, and the end about the same. Many of the Woolly Bear caterpillars we have seen this fall have dense hair. This is an indication the winter will be cold.

Can you take a picture of something and then find it on the Internet? ›

You can learn more about an image or the objects around you with Google Lens. For example, you can take a photo of a plant and use it to search for info or other similar images.

Can I take a picture of an item and find it online? ›

Search with an image saved on your phone

At the bottom, tap Discover. Take or upload a photo to use for your search: To take a photo: Point to an object with your camera and tap Search.

Can you take a picture of something and it tells you what it is? ›

Once you snap the photo and Google Lens identifies the image, you'll get a list of relevant information about it.

What does a hornworm look like? ›

Small tomato hornworms are yellow to white in color with no markings. Large caterpillars develop eight white, V-shaped marks on each side. Tomato hornworms have a black projection or "horn" on the last abdominal segment.

What does a luna moth caterpillar look like? ›

Luna moth caterpillars are lime green with a series of yellow lines and reddish-orange spots running down both sides. The caterpillars are herbivores that feed on the foliage of many types of trees.

What do swallowtail caterpillars look like? ›

Early instar black swallowtail caterpillars are black with orange dots, a white center, and a spiny-looking back. Finding the eggs is tricky—I usually end up just finding the caterpillars. But if you're looking, the eggs look a bit like tiny yellow fish roe.

What caterpillars look like gypsy moth caterpillars? ›

Eastern tent caterpillar larvae look similar in size and coloring to gypsy moth larvae. However, eastern tent caterpillars, as the name suggests, weave tents in tree branch crotches, where they live gregariously.

What looks like a worm but has legs? ›

Millipedes are long, slender, wormlike animals with 4 legs on each of most body segments. Most millipedes have at least 60 legs and in the case of the common, inch–long millipede found in most landscapes and houses, each individual has 160 legs.

What are the little brown worms in my house? ›

Millipedes, also known as “thousand leggers,” are arthropods that often make their way into our homes. Millipedes range from 2.5 to 4 cm long, are brownish in color, are long and slender, and look a lot like worms with legs.

Which furry caterpillar is poisonous? ›

Despite its innocently furry appearance, the puss caterpillar's sting is brutal. The puss caterpillar has venomous barbs along its hairy body. A sting from the insect causes extreme pain and can result in blisters that can last for weeks.

Are Fuzzy Wuzzy caterpillars poisonous? ›

Caterpillars covered with hair or bristles, with one exception, are rarely poisonous. The “fuzzy-wuzzy” caterpillar that predicts winter cold is not poisonous nor is the gypsy moth or your tent caterpillar.

What do the poisonous caterpillars look like? ›

They're entirely covered with tiny green spines all over their bodies. These green spines look like tiny trees or plants growing on their skin. These spines look interesting, and you would want to touch it probably, but it's best to avoid contact with these caterpillars as their spines are very poisonous. What is this?

Is there an insect ID app? ›

Picture insect is an easy-to-use insect identifier tool that utilizes AI technology. Simply take a photo of an insect or upload one from your phone gallery, and the app will tell you all about it in a second. Got bitten by an unknown insect but not sure about its toxicity?

Can Google identify an insect from a picture? ›

If you can't get a clear or close enough picture, you may not be able to identify the type of insect you have. Insects can be quite small and evasive, so catching a photo that works can be…well, a lot of work. Additionally, if the insect blends into the background, Google Lens may not be able to identify it at all.

Is there a free bug identifier app? ›

Picture Insect has an ever-growing database of insects and the expert advice of entomologists, leading it to be one of the top insect identification apps. With both free and premium options available, Picture Insect is perfect for the casual and the serious bug observer.

Are black and orange fuzzy caterpillars poisonous? ›

Q: Are these orange and black caterpillars I see on the highway nearly every fall one of the stinging kind I have heard of? They seem to be pretty bristly. Would it be safe to pick one up? A: Woolly bears are completely harmless (except to the rare person who happens to be allergic to them).

What happens if you touch a spiny elm caterpillar? ›

A small handful of caterpillars have stinging hairs, spines and barbed hooks and are the worms or larvae of butterflies, skippers and moths (Order Lepidoptera). Reactions can range from mild itching or swelling to burning pain and/or intestinal disturbances. In some cases, local lesions may persist for several days.

What is a pus worm? ›

Puss moth caterpillars (Megalopyge opercularis), of the order Lepidoptera, are also known as asps. They are one of the most toxic caterpillars in North America. Puss moth caterpillars are endemic to the southern US and live in shade trees and shrubbery around homes and schools and in parks.

What caterpillars should you not touch? ›

While most caterpillars are harmless, there are several types of venomous caterpillars in the United States that can cause misery to humans who touch them. Among them are the saddleback, io moth, puss, gypsy moth, flannel moth, slug, spiny oak slug, and buck moth caterpillars.

What is the scariest caterpillar in the world? ›

The most dangerous caterpillar in the world is the Assassin or Lonomia obliqua, also from the Saturniidae family. They are responsible for several deaths per year.

Why should you not touch a caterpillar? ›

Contact with the hairs can cause itching skin rashes and, less commonly, sore throats, breathing difficulties and eye problems. This can happen if people or animals touch the caterpillars or their nests, or if the hairs are blown into contact by the wind.

What happens if you touch an American dagger moth caterpillar? ›

The dagger-like hairs can inject poison into the skin of someone who touches them. A fallen hair from the caterpillar can even cause a problem. The reaction to the caterpillar's toxins can include a stinging sensation that ends up as an itchy rash.

Can I touch a fluffy caterpillar? ›

Talk to your children and make sure they know that just because a caterpillar may look cute, furry, or fuzzy, they should not be picked up or touched. It's okay to be curious and observe these eyespots creatures, but a good rule to remember is do not touch or pick up any caterpillars, especially fuzzy or hairy ones.

How can you tell if a caterpillar is poisonous? ›

Caterpillars that are brightly colored, have spines or hairs are probably venomous and should not be touched. "If it is in a place where it can cause problems, clip off the leaf or use a stick to relocate it," Ric Bessin, an entomologist at the University of Kentucky College of Agriculture, tells USA TODAY.

What kind of caterpillar is poisonous? ›

While most caterpillars are harmless, there are several types of venomous caterpillars in the United States that can cause misery to humans who touch them. Among them are the saddleback, io moth, puss, gypsy moth, flannel moth, slug, spiny oak slug, and buck moth caterpillars.

Is this caterpillar a moth or butterfly? ›

A fuzzy or hairy caterpillar ambling through your garden is a moth-to-be. Butterfly caterpillars aren't fuzzy or hairy, but they may have spikes. However, if the caterpillar has smooth skin, it could be either.

What is the can test for caterpillar? ›

– The Cat Can Test is a 3D puzzle designed by Caterpillar – an oversized version of the one that some dealerships, including Cashman, use to gage mechanical aptitude. – Next, the Cat techs' desire to learn is tested when they match Cat engines to specific applications.

What happens if you touch a fuzzy caterpillar? ›

The fuzzy tufts on caterpillars are what can cause a rash. These tiny hairs are called setae . In some people, these hairs cause an allergic reaction when they touch the skin. These symptoms can appear within minutes and last for one or more days.

How can you tell a butterfly caterpillar from a moth caterpillar? ›

Answer. One of the easiest ways to tell the difference between a butterfly and a moth is to look at the antennae. A butterfly's antennae are club-shaped with a long shaft and a bulb at the end. A moth's antennae are feathery or saw-edged.

What does a monarch caterpillar look like? ›

First instar caterpillars are very small and may be pale green or grayish white, appearing almost translucent. Subsequent instars are distinctly striped in yellow, white, and black, with a pair of black tentacles on both ends of their bodies.

What is a black and orange fuzzy caterpillar? ›

Description: The woolly bear is a fuzzy, orange and black caterpillar that becomes a dull, yellow to orange moth with a fat, furry thorax and a small head. Ecology: One of our most familiar caterpillars, woolly bears are renowned wanderers.

What happens if you put salt on a Caterpillar? ›

Cover the caterpillar with salt. Yes, simple salt. Salt draws water out of the spiracles and trachea, allowing air to enter them again.

How do you pass a Caterpillar interview? ›

How to Ace Your Caterpillar Interview
  1. Do your research. Cara says to make sure you are able to speak both knowledgeably and confidently about the company and position you have applied for. ...
  2. Get ready to share some of your experiences. ...
  3. Structure your Answer. ...
  4. Think about why you are interested in the role. ...
  5. Have questions ready.

What is the Sainsbury's test? ›

Sainsbury's Numerical Reasoning Tests

These tests are designed to measure your numerical abilities and relate to graphs, percentages and tables whereby you will be asked to analyse data and chose from a set of multiple choice answers. These are usually times so practicing within a time limit is advisable.


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