Marking the 150th anniversary of the HNHS, The Hertfordshire Naturalist 2025 was published and circulated to members in November. (Transactions of the Hertfordshire Natural History Society Vol 57 (1) pp. 1-88 ISSN 0375 3409)

Contents:

Introduction to the 150th Anniversary Edition (Stuart Warrington)

HNHS Management Committee Report (April 2024 - March 2025)

Then and Now: 150 years of the Hertfordshire Natural History Society (David Utting)

Species accounts

Butterflies: three notable Hertfordshire species (Andrew Wood)

Interesting Trichoptera (caddisflies) and Plecoptera (stoneflies) of Hertforshire (Ronni Edmonds-Brown)

Dragonflies and Damselflies (Odonata) (Roy Woodward)

Orthoptera (Ian Carle)

Spiders (Araneae): Three species new to the County in 2024 (David Carr)

The Southern Wood Ant Formica Rufa in Hertfordshire 1839-2025 (Phil Attewell)

150 Years of Mammal Recording in Hertfordshire (Jenny Jones)

Bryophytes: Pendulous Wing-moss Antitrichia curtipendula re-found in Hertforshire (Agneta Burton)

Scarce Tufted-sedge (Carex cespitosa) in Hertfordshire, still the only site for the UK species (Astrid Biddle)

The County Flower, Pulsitilla vulgaris, the Pasque Flower (Stuart Warrington)

A brief history of fungus collecting and recording in Hertfordshire (Alan Outen)

Some Hertfordshire Natural Historians

Francis Maule Campbell, High Leigh and Porrhomma (Linyphiidae): A great arachnologist, a superb site and a fascinating genus of spider (David Carr)

Robert B. Benson

Sir Edward W. Salisbury

Dr John Dony

Dr Frederick W. Edwards

Some Hertfordshire Places

The Rothschild Reserves in Hertfordshire: Aldbury Nowers and Bricket Wood Common (Stuart Warrington)

Nicholls Farm, Redbourn (Peter Tallantire)

The Fossils of Scott's Grotto, Ware (Michael E. Howgate)

The Bourne Gutter - The most famous winterbourne in Hertfordshire (Nick Pierpoint)

Ancient Woodland and Wood Pasture / Parkland in Hertfordshire (Niamh O'Reilly and Alex Waechter)

Recording Natural History

State of Data at the Herts Environmental Records Centre (Alex Waechter)

Technology development and how it changes the ways we record wildlife (Alla Mashanova)

Using DNA-barcodes and eDNA to identify species (Stuart Warrinton and Adam Hillier)

 

Obituary: Raymond Uffen (David Utting)

Members of the Management Committee