The Hertfordshire & Middlesex Branch has over 1000 members and covers the administrative county of Hertfordshire and the Watsonian Vice-county of Middlesex (VC21).

The London Boroughs included within the Branch area are Barnet, Brent, Camden, City of London, City of Westminster, Ealing, Enfield, Hackney, Hammersmith & Fulham, Haringey, Harrow, Hillingdon, Hounslow, Islington, Kensington & Chelsea, Richmond (north of the Thames), Tower Hamlets and the Surrey District Council of Spelthorne.

If you live in the region and are a member of Butterfly Conservation you automatically become a member of the Hertfordshire & Middlesex Branch.

Find out more 

Common Blue - Dave Green

Have you seen a butterfly?

Let us know what butterflies you have seen on the wing and check out our latest sightings. 

Peacock - Dean Morley

Butterflies of Hertfordshire & Middlesex - by Andrew Wood

This guidebook includes:

  • Photographs of each species
  • Where and when to see them
  • Why are they disappearing

Buy your copy now!

Get involved 


  • Has the ‘COVID effect’ worn off for nature lovers?

    Big Butterfly Count sees a drop in participants compared to 2020 and 2021, and urges the public not to forget the benefits of being connected to nature – and it’s not too late to take part!

  • Volunteering with Big City Butterflies

    Shae Wiedermann is studying for a Masters in Ecology, Culture and Society at Goldsmiths College, London. She volunteered with the Big City Butterflies project and tells us about her time with the team...

  • Migratory monarch butterfly now Endangered - IUCN Red List

    Gland, Switzerland, 21 July 2022 (IUCN) – The migratory monarch butterfly (Danaus plexippus plexippus), known for its spectacular annual journey of up to 4,000 kilometres across the Americas, has entered the IUCN Red List of Threatened SpeciesTM as Endangered, threatened by habitat destruction and climate change. 

  • Butterfly scientists call on public for help.

    Butterfly Conservation launches this year’s Big Butterfly Count with a warning that time is running out to help save species.

Catch up on all our news


  • Guided butterfly walk at Horsenden Hill, Greenford (LB of Ealing)

    Saturday 13th August 2022, 10:30am-2:00pm

    Horsenden Hill, meet Horsenden Farm, Horsenden Lane North, Greenford, UB6 7PQ

    Guided walk for White-letter Hairstreak and other summer butterflies including Marbled White and Purple Hairstreak, and see the moths recorded the previous night with local expert Dave Howdon. Joint event with the Friends of Horsenden Hill and Ealing Wildlife Group.

    No booking is required

  • Guided butterfly walk at Therfield Heath, nr Royston for Adonis Blue

    Monday 22nd August 2022, 11:00am-1:00pm

    Therfield Road car park off Therfield Road in Royston

    Guided butterfly walk for Adonis Blue and late summer butterflies. An opportunity to be shown around this important chalk grassland site with local expert Martin Johnson. Therfield Heath supports a recently established colony of Adonis Blue

    No booking required

  • Hertfordshire & Middlesex; Butterfly Walk at Nomansland Common

    Sunday 25th September 2022, 2:00pm-3:30pm

    Nomansland Common Near Harpenden

    Guided walk for Small Copper and other early autumn butterflies. A Wilder St Albans Event with local expert Malcolm Hull

    Booking is essential

See all our upcoming events

Volunteer with us

Butterfly Conservation relies on the support of thousands of volunteers, and we are always looking for more help inside the office and out in the field. Whether you want to volunteer at a local branch, get outside and help manage our nature reserves, or help with one of our events, we have something for everyone to get involved in! Your time can make a real difference.

Find out how to get involved.

In your area

Contact branch

  • Branch Chair/Acting Treasurer:
    Malcolm Hull
  • Branch Secretary:
    Liz Goodyear
  • Membership Secretary and Newsletter editor:
    Ian Small
  • Recording and Transect co-ordinator:
    Andrew Wood
  • Website co-ordinator:
    Peter Clarke