Phascinating Phasmids

Heteropteryx dilatata female
Heteropteryx dilatata female

Every child has at one point been enamored by the idea of insects that do not look like insects; leaves that are alive, blades of grass that can move, bits of bark with a set of legs, and the all-time favorite in first-grade classrooms, walking sticks! These six-legged wonders are from the order Phasmatodea, but we in the circles of Arthropod husbandry refer to them simply as Phasmids. They are a delightful bunch of insects that make excellent pets, and are fascinating on many levels.

The Wonderful World of Phasmids

Phasmids are closely related to grasshoppers and crickets, which can be noticed by their similar head shape and compound eyes. But unlike their cousins, they do not make noise, and they are strictly herbivores, meaning they eat primarily leaves. Many phasmids will, however, devour their old skin after they molt as an added boost of nutrients that they will benefit from in their new, soft body. Gross, but efficient!

They like a warm, humid environment, which is why most of them live in the heavily-forested tropics of Asia, South America, and Australia. There are over 3,000 species of phasmids on the planet, with approximately 150 living in Australia. Some 30 are even found right here in the United States, perhaps in your backyard!

21 examples of different phasmid eggs
21 examples of different phasmid eggs


Phasmids are interesting because they display such exaggerated sexual dimorphism (that is, the ladies and gents look very different from one another). The females are nearly always much larger than the male, sometimes two or three times as large! The males are slim, and usually equipped with wings, while the females only possess stunted flaps and are mostly flightless.

Phasmids are of great interest to scientists because they are parthenogenic, meaning that a female is able to produce offspring without ever meeting a male in her life. However, the eggs produced by parthenogenic mothers are always female, and are exact copies of their sole parent. In fact, in the case of the Indian stick insect (Carausius morosus), there has never been a documented male of the species in captivity.

The Indian walking sticks that we are all familiar with seem to be the typical phasmid shape and size, however, there are countless species of much larger and much stranger phasmids from all across the globe. These species include...

Types of Phasmids

Phobaeticus chani love to make friends!
Phobaeticus chani love to make friends!

Phobaeticus chani, or Chan's megastick, was only just discovered in the jungles of Borneo is 2008, and has since been described at the longest insect living on our planet. One specimen, held in the Natural History Museum in London, measures almost 2 feet in length from tip of abdomen to tip of antennae, with 14.1 of those inches being the body. Being that it is such a new species to science, little it known of its habits.

Extatosoma tiaratum can grow to 8 inches long!
Extatosoma tiaratum can grow to 8 inches long!

Extatosoma tiaratum, or the giant prickly stick insect, is a delightful crawler from Australia and New Guinea with a tendency to curl its abdomen over its back. Like all phasmids, they are harmless, and the curly "tail" is often perceived as being cute by onlookers. The males of this species have the ability to release a smell when they are threatened, but you may find it to be rather appealing - it smells like peanut butter or toffee!

Heteropteryx dilatata, or the Malaysian jungle nymph, is my personal favorite. The females of this species are the heaviest of all the phasmids, and can grow to a hefty 65 grams. They are a beautiful, flashy green, while the males are more subdued in all ways, and usually brown. These phasmids love to chow down on blackberry leaves and English ivy, and when they feel threatened they raise their back legs up in the air in a hand stand display.

Is it Phyllium giganteum..or a leaf?
Is it Phyllium giganteum..or a leaf?

Phyllium giganteum, or the great walking leaf, possesses arguably the most impressive leaf mimicry in the animal kingdom. The individual leaf bugs can have smooth, green edges so as to appear like a clean, new leaf, or it may have tattered, slightly browned edges to make it look like a weathered leaf. Some leaf bugs may even have false bite marks in their side to look even more like a piece a foliage. These are another phasmid species where, in captivity, a male has never been witnessed.

An Achrioptera fallax struttin' his stuff
An Achrioptera fallax struttin' his stuff

Achrioptera fallax are found throughout Madagascar, and are unique amongst phasmids in that the males are the ones that are more noticeable. The male Achrioptera is a sight to behold, with remarkable color that make him immediately identifiable even among those who are not experts. Hues of electric blue, reflections of green, flashes of red and bright orange wings mark him as one of the most beautiful of all phasmids, and indeed, among the most stunning of all insects.

Phasmids as Pets

Though perhaps unusual in comparison to a dog or a cat, phasmids have proven to be rewarding pets due to their simplistic care requirements and fun behavior. I have yet to meet someone who has not found it curious watching a phasmid devour an entire leaf in less than a minute, or smiled as a phasmid wiggled back and forth to mimic a leaf swaying in the wind. As far as insects go they are fairly long lived, many females sometimes living to be 3 years old. Unimposing and beautiful, phasmids provide a touch of exoticism and a taste of nature to any modern home or apartment.

Many phasmids, such as Carausius morosus, require only the most modest of living quarters, and can survive for endless generations in a Kritter Keeper filled with blackberry bush clippings. Others, such as the Extatosoma tiaratum, require larger houses and higher humidity. All do best at temperatures of at least 70 F. and benefit from a continuous supply of fresh greenery to munch on. Blackberry bush (bramble), oak, privet, hawthorn, and English ivy are all excellent foods for phasmids, but some may favor one type or the other. For example, Heteropteryx dilatata frequently enjoys English ivy, but Extatosoma tiaratum snubs it.

In Europe the keeping of phasmids is quite popular, and often goes hand-in-hand with the keeping of reptiles and other unusual exotics. Due to the ever-restrictive pet laws in North America, however, many of these beautiful insects are prohibited to import into the U.S. But restrictions are rarely enforced within the country, and there remains many successful breeders throughout the states. Phasmid owners and producers can be quite secretive about their whereabouts and collection, and it is best to treat them with respect and confidentiality.

If you are interested in locating phasmid breeders, it's best to start looking in groups of reptile breeders first. Many times they are one in the same, and their target audience is side by side. Attending reptile shows in your area will oftentimes bring you face-to-face with these delightfully amazing creatures, as well as any supplies you may need to care for them. Good luck, and happy leaf hunting!

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Comments 18 comments

Esmeowl12 profile image

Esmeowl12 4 years ago from Sevierville, TN

This was so interesting. Although I wouldn't want any of these creatures as pets, they are really neat to look at and almost seem "made up," as they are so unusual. Thanks!


Shaddie profile image

Shaddie 4 years ago from Washington state Author

They do look "out of this world" don't they? :)


Melissa A Smith profile image

Melissa A Smith 4 years ago from New York

They are so cute it hurts. But what to do with all the babies :(


Shaddie profile image

Shaddie 4 years ago from Washington state Author

The babies have a high rate of mortality unfortunately, in an egg mass containing 100 eggs, it's often very likely than only 20 will survive. But it's the same way in the wild and there is only so much you can do to help them along!

Babies can be kept in tupperware containers with a few holes poked on the sides until they are large enough to be kept in cages with mesh lids. My favorite way to keep babies are in large glass terrariums with Saran wrap stretched over the top and lots of holes poked into it. They can't seem to get a good grip on the Saran wrap, especially when they're upsidedown, so they don't escape out of the holes.


Melissa A Smith profile image

Melissa A Smith 4 years ago from New York

How many of yours reach adulthood? Since they can lay fertile eggs, I would imagine that the population would get large rather quickly...


Shaddie profile image

Shaddie 4 years ago from Washington state Author

With the extatosoma tiaratum I have raised, about 20 to 30% usually reach adulthood, they are very delicate in the beginning and can fall prey to a number of mysterious ailments. The females can lay viable eggs, but you can just locate and toss them if you don't want to end up raising an army of bugs :P


Shaddie profile image

Shaddie 4 years ago from Washington state Author

Also, a lot of them are in high demand as pets depending on what type (especially Heteropteryx dilatata). If you ever find yourself with an abundance of them, there are assuredly people out there who would be interested in buying some off of you.


Melissa A Smith profile image

Melissa A Smith 4 years ago from New York

Omg you've just convinced me. They sell large ones at the reptile show and I've always had to turn them down because of the egg thing, but screw that. I'm getting one! My mom hates you, lol.


Janie 4 years ago

these bugs are really interesting, my cousin has some and they looked creepy to me but it seems like they are nice after all!


Melissa A Smith profile image

Melissa A Smith 4 years ago from New York

Got Peruphasma schultei and Screptrophasma hispidulus today!


Shaddie profile image

Shaddie 4 years ago from Washington state Author

You're kidding! I've never seen a schultei in person and do not know of anyone in my area breeding any. You are very lucky!

I am unfamiliar with "Screptrophasma hispidulus" though. Does it have a more common name?


Melissa A Smith profile image

Melissa A Smith 4 years ago from New York

Yes, I love their weird little faces, there's about 9 of them. Hmm, that's weird. I wrote what was on the cup, but yeah they are stick bugs, it says they come from India. They are all so cute.


Shaddie profile image

Shaddie 4 years ago from Washington state Author

Did you order them or did they come from an expo or store? I'm very curious now. I'd love to see pictures of them if you take any :)


Melissa A Smith profile image

Melissa A Smith 4 years ago from New York

The common name is Andaman Islands Stick Insect, not sure why the scientific name doesn't show up, lol. It's cute, I saw a cute bug and bought it. I got them from a reptile expo, I have the email of the vendor. Was hoping he had the bigger ones (Extatosoma tiaratum) but this is what he had this time. How should I send the pictures?


Shaddie profile image

Shaddie 4 years ago from Washington state Author

Well they sound fun, regardless! You could send any pictures you'd like to my e.mail (Shaddiewolf@hotmail.com). There are so many leaf and stick bugs out there, it's cool to see someone else getting into the hobby :)


Gcrhoads64 profile image

Gcrhoads64 3 years ago from North Dakota

Fascinating! I never thought of a phasmid as a pet.


Shaddie profile image

Shaddie 18 months ago from Washington state Author

Thanks so much! They really make great pets :)


Shaddie profile image

Shaddie 14 months ago from Washington state Author

Oh wow, it's rare that I get to meet another phasmid keeper here on HP! The link you sent me doesn't seem to be working though :(

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