Hertfordshire Amphibian and Reptile Group (HertsARG)

About us

About Us

Hertfordshire Amphibian and Reptile Group (HertsARG) was established in 2011 to promote, conserve and study Hertfordshire's native populations of reptiles and amphibians. Since then we have gone from strength to strength and warmly welcome new members whatever their level of knowledge or experience. We have  Whatsapp and Facebook groups.  The group contains several licensed great crested newt workers and we are happy to take questions and queries from the public on these and other species.

The following species are found in Hertfordshire;

Smooth newts (Lissotriton vulgaris)

Great crested newts (Triturus cristatus)

Palmate newts (Lissotriton helvetica)

Common frogs (Rana temporaria)

Common toads (Bufo bufo)

Midwife toads (Alytes obstetricans) *Non-native and generally restricted to St Albans area*

Common/viviparous lizards (Zootoca vivpara)

Wall lizards (Podarcis muralis)

Slow worms (Anguis fragilis)

Grass snake (Natrix helvetica)

There are no reliable records of adders (Viper berus) in Hertfordshire. Despite extensive searching across the county, we have not found any. They are therefore regarded as extinct here, pending proof of any animals being provided.  Any suspected bites or injuries should be taken to hospital  or veterinary surgery. 

Over the coming months we hope there will be news of a number of interesting and valuable conservation and research projects. Should you wish to become involved, or simply to be kept updated of progress, please email your contact details to davewillisbhs@yahoo.co.uk.

If you have any questions or ideas for future work, or know of a site you think may be of interest, let us know!



David Willis - Founder

(Please email for details, upcoming projects and any unwanted animals)


Telephone: 07581121270

Mammal Amphibian and Reptile Atlas (MARA) and Herp record queries;

Dr Chantal Helm or Mr Ian Flack
University of Hertfordshire





Hertfordshire reptiles and amphibians

Posted on Sunday 17th April, 2011
Have you seen a frog in your pond or a snake in the grass? If so, please let HertsARG know.  We can ensure that these records are added to county-wide databases which will build up a picture of species numbers in the county. Working with other organisations, we can then help focus attention on those areas which could benefit from conservation work. These records will be shared with Hertfordshire Natural History Society and the Wildlife Trust among others. Please contact davewillisbhs@yahoo.co.uk.

Easter Newt Hunt

Posted on Sunday 17th April, 2011
Please try and get involved with this survey, helping to establish newt numbers in England and Wales. Don't forget to send your results through to HertsARG for our county records too!  Full details can be found at; http://www.newthunt.org

Bayfordbury Survey Day

Posted on Thursday 17th March, 2011

Bayfordbury Herp Surveying Session 


Saturday 2nd April 2011 at 2pm




This is an opportunity to meet other volunteers and have an introduction to the surveying of reptiles and amphibians. It should last 2-3 hours with the emphasis being on learning and sharing knowledge. We are lucky in having Dr Jenny Jones (County recorder for Reptiles and Amphibians) and Dr Ronnie Edmonds-Brown (University of Hertfordshire Natural Sciences) joing us .

The approximate structure of the meeting (subject to change)will be;


-Welcome and Introduction to HertsARG (Dave Willis)

-Herpetological Field Surveying (Dr Edmonds-Brown)

-Exploration of ponds and grounds of Bayfordbury Centre

-Summary and Q&A session




HertsARG has received generous assistance from staff at the University of Hertfordshire. Thanks especially to Shaun Dowman at Bayfordbury Learning Centre. Information regarding the centre and its location can be found here;




Toilets and tea and coffee facilities will be available. Please bring sensible clothing, being mindful of the changeable April weather. 


It would be much appreciated if you could confirm whether or not you will be able to make it beforehand, so that we have an idea of numbers. Any questions or queries, please do not hesitate to contact me.

Progress continues!

Posted on Sunday 27th February, 2011
Progress continues with the development of HertsARG. We are being offered support from a number of groups and a number of people have agreed to join us in our efforts. A special welcome to Dr Jenny Jones, the county recorder for Reptiles and Amphibians from the Hertfordshire natural history society (www.hnhs.org). Her involvement will be invaluable in ensuring this organisation collects and collates valuable data for conservation and research.

Hertfordshire becomes the UK’s newest ARG!

Posted on Wednesday 23rd February, 2011
The 2011 Herpetofauna Workers’ Meeting in Cardiff provided the inspiration for setting up the UK’s new Hertfordshire ARmphibian and Reptile Group. As always, this excellent conference allows the annual get-together of 150 people from county ARGs across the UK, and this year’s meeting provided an inspiring set of talks and workshops over two days.

There has never been an ARG group dedicated solely to the county of Hertfordshire. The wildlife charity LEHART covers the counties of London, Essex and Herts, and has a herpetofaunal focus, but it was felt that there was still room for a Herts-based ARG to generate more volunteer interest in amphibians and reptile across the county. Enthusiastic founder of HARG, David Willis, said “The minor problem I have is that there is no existing Herts ARG, and so the new website would have to be as much an appeal for interested members as anything, with a list of sites and tasks to be updated over time, and hopefully links to any organisations that want to be included.”

So please do consider joining Herts ARG by emailing davewillisbhs@yahoo.co.uk and get your name added to the email circulation list. A Yahoo Group may also be formed in due course, to allow posting of news, ideas, photos etc.

Also, if you have any ideas now for Herts-based amphibian or reptile projects, please contact us!



Show Past Events

Toad Crossings 2021

Mon 1st February, 2021 - Wed 31st March, 2021

Want to help out our declining toads? Several Toad crossing sites are now registered in Hertfordshire at a range of locations, and HertsARG volunteers have been helping out wherever they can. Please get in touch if you would like to help toads on roads, or know of a site where they are being killed by cars on the way to their ponds.

Contact us

Contact Us

David Willis - Founder

(Please email for details, upcoming projects and any unwanted animals)


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