Welcome to the website of the Hertfordshire Natural History Society

We promote the study and recording of wildlife in Hertfordshire and encourage a wider interest in natural history including the conservation of wildlife, habitats and geological features.

Our members share an interest in nature and observing and studying wildlife. We get real value from your observations by coordinating and compiling everyone’s records to build up a comprehensive picture of the state of wildlife in the county. This helps us understand how it is changing over time in response to the pressures of modern life and climate change.

Pseudococcyx posticana​Pseudococcyx posticana

Late spring has yielded exciting moth discoveries, including a first confirmed record for Hertfordshire of Pseudococcyx posticana whose larvae feed on Scots Pine. It was trapped in a Hemel Hempstead garden by HNHS member Ian Bennell. A previously claimed record for the species is pre-20th century and lacks supporting data.

An undoubted newcomer, however, is Pammene ignorata: found in two separate locations during May, and a ‘first’ for south-east England as well as the county. Little is known about the moth's habits, but in continental Europe its larvae feed on Lime and Elm. The Herts Moth Group website has further information about recent sightings

 Pammene ignorata

Photographs of Hertfordshire wildlife can be emailed (in jpeg format) to photogallery@hnhs.org. The pictures we receive are published in the HNHS photo galleries here, while others can be found in the Flora group and Bird Club websites. Note that we are currently seeking a volunteer willing to spend a few hours each month keeping the HNHS website photo galleries up to date. Contact if you might be interested.

All the latest natural history news can be found on our news page. The latest and past newsletters can be downloaded here.

HNHS bookshop

Butterflies of Hertfordshire & Middlesex –  £25

Birds of Hertfordshire – £34

Hertfordshire Geology and Landscape – £34

Flora of Hertfordshire – now only £25

Moths of Hertfordshire – now £15

Dragonflies of Hertfordshire – now £5

Prices do not include P&P
You can now order online and pay with your debit/credit card via PayPal – full details here

We have been studying and documenting the natural history of our county for over 130 years. We endeavour to cover all branches of natural history relevant to Hertfordshire.

We encourage wildlife recording. You can submit your records on line for birds, for mammals, amphibians, reptiles and dragonflies and for plants, view the latest sightings and sightings archive (from 2010).  Learn more about our objectives.

We have a network of 26 county wildlife recorders who are experts in their field and collate the records for specific groups, such as birds, mammals, insects and flowers. Their reports are published in our annual journals, The Hertfordshire Naturalist and The Hertfordshire Bird Report. We also publish books on specific subjects,

We have specialist groups that focus on birds, moths and flora and close links with other local groups such as Butterfly Conservation.

Membership is open to anyone, whether or not you live in the county.

The HNHS 1875 Awards for outstanding Hertfordshire naturalists and individuals making outstanding contributions to natural history in Hertfordshire are presented at the autumn meeting each year.

The Society depends on voluntary donations and annual subscriptions from members all of which are devoted entirely to carrying out our work, as all officers are honorary.

Specialist groups:

Current projects:

Hertfordshire Mammal, Amphibian and Reptile Atlas

Herts Invertebrate Project

Heartwood Monitoring Project


Social media:

To keep informed about HNHS, follow us on Facebook and Twitter and look at the stunning photographs on our Flickr page.

View our Facebook page  Follow us on Twitter  View our photos on Flickr

Injured animals and birds:

Neither HNHS nor Herts Bird Club is equipped to help, please follow these links for advice on what to do:

The RSPCA the national charity that gives help and advise on sick and injured birds and animals.

RSPB has advice on injured and orphaned birds.

Tiggywinkles and the Swan Sanctuary have advice and also take in wild birds in need of care.