This calendar has been compiled by the Hertfordshire Natural History Society (HNHS) on behalf of natural history organisations in Hertfordshire. The type of event is colour coded: Outdoor events, Indoor meetings.

Tue 26 May 2026 (7.30pm for 8pm)

The status of butterflies in Hertfordshire and Middlesex

The speaker is county butterfly recorder Andrew Wood, author of 'Butterflies of Hertfordshire and Middlesex'.

The United Reformed Church Hall, Mill Lane, Broxbourne, EN10 7BG (Wheelchair accessible)

Organised by: RSPB South East Herts Group

Sun 07 Jun 2026 (9.30am)

Heartwood forest walk

In early June the forest is buzzing with summer wildlife attracted to the wildflower meadows and nesting birds are actively feeding their hungry offspring. Meet at Heartwood Forest car park. Nearest postcode: AL4 9DQ.

Organised by: RSPB South East Herts Group

Thu 11 Jun 2026 (7pm to 11pm)

Bat Identification Workshop at Stotfold Mill

Start Date/Time Thursday 11th June 2026 at 7:00pm
End Date/Time Thursday 11th June 2026 at 11:00pm
Location: Stotfold Watermill & Nature Reserve, Letchworth Garden City SG5 4NU

Want to develop your bat identification skills? Interested in understanding bat sounds? This workshop includes a practical session by a river to practise your skills and enable you to take part in surveys for the National Bat Monitoring Programme (NBMP).

Organised by: Other

Wed 17 Jun 2026 (9.45am)

Therfield Heath walk

For farmland birds, spring migrants and butterflies. Meet in the Royston Heath Sports Centre car park. Postcode SG8 5BG. (T).

Organised by: RSPB South East Herts Group

Wed 15 Jul 2026 (9.45am)

Broxbourne Woods and Heath walk

. A wander through this area is excellent for butterflies, dragonflies and other insects. Meet at 9.30am Free parking at Broxbourne Woods West car park. Postcode SG13 8NZ.

Organised by: RSPB South East Herts Group