Welcome to the Phasmid Study Group (PSG)!

Welcome to our NEW WEBSITE!!! We are an international community passionate about keeping, rearing and studying phasmids (also known as "stick insects" and "leaf insects" or, in the USA, "walking sticks"). Our members range from hobbyists to some of the World's most knowledgeable professional entomologists - including several published and well-known authors on the subject! We have members all over the world.

Become a member!

Our website contains extensive general information about these fascinating creatures, with in-depth information available for all species successfully breed in the UK (see our PSG Culture List). If you have a specific interest in species successfully bred in mainland Europe, check out our sister organisation, Phasma.

We are continuing to add new content to the website all the time, so keep checking back for new articles! To get started, take a look at the "About Us" and "Phasmids" menus, where you will find lots more information about the PSG and phasmids in general. You can also chat with lots of other phasmid fans on our Facebook page.

Welcome to our site, we hope you find it interesting and very useful!

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Parasites of Phasmids

Parasites of Phasmids Perhaps the most interesting of phasmid parasites are not always classified as parasites! The parasitoid (parasitoids are like parasites but invariably kill their host) wasps of the families Loboscelidiinae and Amiseginae (Chrysididae) use phasmid eggs as their hosts. These two chrysidid subfamilies are under-collected and under-studied. For more information please see the...

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Common Names

Common Names Common names ("vernacular names") for insects can help make things seems easier when you first start out, but their use is not recommended for the following reasons: They are inconsistent between countries and cultures They may be misleading due to use of inaccurate descriptions in the venracular names The same vernauclar name may apply to several different species ...

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Privacy Policy

LEGAL PRIVACY POLICY for The Phasmid Study Group (PSG).   We at the PSG respect the privacy of our visitors and are committed to preserving your online safety by preserving your privacy at anytime you visit or communicate with our site.  Our privacy policy has been provided and reviewed by the solicitors at Legal Centre who specialise in online internet contracts.   Our Terms...

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Predators of Phasmids

Predators of phasmids Various predators of phasmids have been recorded under wild and captive conditions, including monkeys, rats, birds, frogs, lizards, spiders, praying mantids, ants, and humans. In addition phasmids are attacked by mites, parasitoid flies, and biting midges (Bedford, 1978), and the eggs may be attacked by parasitoid wasps (Rapp, 1995), or be carried off by ants. In captivity...

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PSG Phasmid Care Information

Phasmid Care Sheets The Phasmid Study Group ("PSG") is an international community passionate about keeping, rearing and studying phasmids (also known as "stick insects" and "leaf insects" or, in the USA, "walking sticks"). Our website contains extensive general information about these fascinating creatures, with in-depth information available for all species successfully breed in the UK. F...

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Naming Phasmids

Naming Phasmids – A Beginner's Guide by Phil Bragg How it all started Carl Linnaeus (1707-1778) founded the systems of scientific names that are used for naming plants and animals. The rules are similar, although the two systems are separate. The system for naming animals dates from 1758. This is the publication date of Linnaeus' tenth edition of 'Systema Naturae' (the botanical system...

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Phasmids In The News

Phasmids In The News We are always looking for more phasmid-related news articles.  If you see one, please scan it and send it to us via this form and we'll add it to this page! Note: All copyrights remain with the original publishing body.   img { border: 1px solid black;} ...

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Phasmids: An Introduction to Stick Insec…

Phasmids: An Introduction to Stick and Leaf Insects Stick insects (known as walkingsticks in the USA) and leaf insects form the order Phasmida (also known as Phasmatodea, Phasmatoptera, and Cheleutoptera). The name of the order derives from the Latin ‘Phasma’ meaning phantom, apparition, spectre or ghost. The majority of species camouflage themselves as sticks and leaves, although some suc...

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Looking After Stick Insects

Looking After Stick Insects Adapted from the article 'Looking After Stick Insects' by Michael and Frances (PSG Newsletter 21). Housing Many species of stick insect can be kept together, but different bulky or pinching stick insects may harm each other. Stick insects should be kept indoors at living room temperatures or slightly above. Greenhouses may well be too hot. Cages can be heate...

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Spermatophores Reviews of the occurrence of spermatophores in Phasmids (Bragg, 1991a; Carlberg, 1981) and subsequent records (Bragg, 1991b, 1992, 2001) provide strong evidence that this is the normal mechanism for sperm transfer in the order. Spermatophores have been found in 21 species, five families, and nine subfamilies (see table below). Seven of these records are based on my Bornean materi...

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World's Longest Stick Insect

World's Longest Stick Insect The longest described stick insect in the world was described in 2008 in the journal Zootaxa by British scientist & Phasmid Study Group member, Dr Phil Bragg. The insect is called Phobaeticus chani after Datuk Chan Chew Lun and measures 357mm from head to end of abdomen. The previous record was held by Phobaeticus kirbyi, a closely related species. First Repo...

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Meet Our Experts

Meet Our Experts! The PSG is very lucky and exceptionally proud to have some field experts and published authors within our group. Members get the opportunity to hear talks from some of our experts and to chat personally with them at our twice-yearly meetings. Our experts also contribute to the group's excellent publication Phasmid Studies and occasionally the PSG Newsletter. To all friends ...

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Species Named After PSG Members!

Species Named After PSG Members Compiled by Phil Bragg & Judith Marshall About 441 species of phasmids have been named after men, and 42 after women (data from The Phasmid Database, 2007). Species named after men end in i or ii; those named after women end in ae. Since the formation of the PSG in 1980, 38 species have been named after members of the Group. These two display cases o...

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The Naturalised British Stick Insects

The Naturalised British Stick Insects By Malcolm Lee, November 2013 Have you seen stick insects in the UK? Report your sighting! If you have been lucky enough to come across stick insects in the UK, please report your sighting here - we would be very grateful to hear from you. Your report will be sent to the collator of all records of the UK's naturalised stick insects, helping us to...

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Aquatic Phasmids

The Myth of Aquatic Phasmids In 1866 an aquatic phasmid was reported by Andrew Murray in the Annals and Magazine of Natural History. Murray was reporting it on behalf of Alexander Fry who in turn had been told about it by "someone" in whom Murray assumed Fry had "the fullest confidence". The species concerned was Prisopus flabelliformis from Brazil. The observer said "... its habits were t...

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PSG Census

PSG Census Species Name PSG No. Ova Nymphs Adults Health of Culture New/TentativeEstablished ...

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The Nuisance of Name Changes

The Nuisance of Name Changes and Gender Agreement - Why do we do it? What's in a name? For both people and pets (including stick insects) we have males and females, and usually only refer to inanimate objects as '€˜it' or of neuter gender, i.e. neither male nor female. Similarly, for the scientific names of animals and plants we use words which may be masculine (m.), feminine (f.) or neuter ...

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Join Us!

Join the PSG How to Join If you have PayPal, click here to join online and become a member right now! No PayPal?  No problem. In addition to PayPayl, we accept Cash, Cheque, Postal Order or International Postal Giro. Just print off our membership application form and send it, along with your payment, to our Membership Secretary (address is on the form). Why Join Us? As a member...

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About Us

About the PSG We are an international community with the common interest of rearing and studying phasmids (stick insects and leaf insects, or "walking sticks" as known in the USA). Many members are just hobbyists and amateur entomologists, but our membership also includes some of the most knowledgeable professional entomologists in the world including several authors on the subject! We have ...

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