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.

Wed 24 Oct 2018 (9.45am)

Morning walk in the Lea Valley from Wheathampstead to Waterend

A half day birdwatching walk led by Ann and Roger Doubleday.

Please inform the leaders if you plan to attend (

Meet in Wheathampstead, contact Ann or Roger for details of meeting place

Optional £1 donation to the RSPB.

Organised by: RSPB Harpenden Local Group

Fri 02 Nov 2018 (7.30pm)

Cuckoo - cheating by nature

The sight of a little warbler or pipit feeding an enormous cuckoo chick has astonished human observers for centuries. Ecologist Prof Nick Davies of Cambridge University will explain how field observations and experiments reveal a continuing evolutionary arms race between host defences and cuckoo trickery. Venue: 'The Settlement’ Nevells Road, Letchworth SG6 4UB; £3 entry charge for non-members of Hitchin & Letchworth RSPB Group.

Organised by: Other

Sat 03 Nov 2018 (2pm to 5.30pm)

HNHS Autumn Meeting and AGM

The Society's Autumn Meeting and Annual General Meeting will take place from 2pm to 5.30pm on Saturday 3 November at the offices of Affinity Water, Tamblin Way, Hatfield AL10 9EZ.

The speakers include amateur limacology enthusiast Chris du Feu, whose presentation on 'Slugs: why bother?' will include an identification workshop – with live specimens to be contributed by the audience!

Matt Dodd, Planning and Biodiversity Manager with the Herts and Middlesex Wildlife Trust, will talk about his role supporting conservation through monitoring development proposals.

There will also be an update from Chantal Helm on the Hertfordshire mammal, amphibian and reptile atlas (MARA) project as the countywide survey approaches its final year.  The meeting will also include the presentation of the Society's prestigious 1875 Awards for 2018, which are made to "an outstanding Hertfordshire naturalist" and "an outstanding contributor to natural history in Hertfordshire".

Organised by: Hertfordshire Natural History Society

Sun 04 Nov 2018 (8am to 10.15am)

Harpenden Lea Valley Walk

Guided walk, led by John Taylor, along the River Lea identifying local birds.

Meet on the footbridge over the River Lea near the 'Marquis of Granby' (at the junction of Crabtree Lane and Marquis Lane).


Optional £1 donation to the RSPB.

Organised by: RSPB Harpenden Local Group

Thu 08 Nov 2018 (8pm)

Wildlife through my lens

An illustrated talk by professional photographer Russell Savory.

All Saints Church Hall, Station Road, Harpenden AL5 4UU 

Price: £3



Organised by: RSPB Harpenden Local Group

Sat 17 Nov 2018 (10am to 4.30pm)

Bedfordshire NHS: Conference on 'Neglected Insects'

Day conference at the Forest Centre, Millenium Country Park, Marston Moretaine, Bedfordshire MK43 0PR. 

Entrance: £20 for BNHS & Bird Club members, £25 for non-members.

Fee includes all refreshments and cold buffet lunch. For booking form / tickets visit

Topics and speakers include:

Craneflies                                                                                                  John Kramer

Long-legged Flies or “Dollies”   (Dolichopodidae)                                     Martin Drake

Organised by: Other

Sun 18 Nov 2018 (9.30am)

Lee Valley birdwatching

Guided birdwatching in the Lee Valley (via RSPB Rye Meads, finishing at Amwell NR), looking in particular for wintering reed bed and wetland birds such as Bittern and Smew. Own transport. Meet at Fishers Green car park (O/S 166, TL 375 025) at 9.30am. 

Organised by: Other

Tue 20 Nov 2018 (10 or 10.30 (check))

Bryophyte Group

Bryophyte Group meetings start at 10 or 10.30am and run until mid-afternoon. 

Contact Agneta Burton – – for details about location and precise time. Also if you wish to be added to group email list.

Organised by: Other

Wed 28 Nov 2018 (9.45am)

Morning walk from Westfield Road to East Hyde

A half day birdwatching walk led by Ann & Roger Doubleday

Meet at the start point on Westfield Road

Please inform the leaders if you plan to attend (

Optional £1 donation to the RSPB.



Organised by: RSPB Harpenden Local Group