Events
Rain or shine, every month a dedicated group of RevIvel Volunteers meet in Radwell (Herts) to survey the upper River Ivel.
The volunteers have been carefully trained, and the results of each riverfly survey are passed to the Herts & Middlesex Wildlife Trust.
Would you like to get involved? If so, please contact RevIvel. Thank you.
The Rivers Trust 2026 Big River Watch event will take place from the 24th to 30th April 2026.
Can you get involved to help this vital annual event for the River Ivel?
RevIvel needs more help to raise awareness about the River Ivel. The upper River Ivel is one of the most heavily abstracted chalk streams in the UK. We need more volunteers to step forward and get involved in surveying the Ivel from Baldock to Tempsford.
To get involved, please go to The Big River Watch website here: https://theriverstrust.org/take-action/the-big-river-watch#main-content
Taking part in a river survey is fun and easy. We would love for people to complete Big River Watch surveys at:
Baldock (Ivel Springs), Radwell, Stotfold, Henlow, Langford, Biggleswade, Sandy and Tempsford. Thank you.
23-25 January 2026 – Please support the RSPB Big Garden Birdwatch!
The RSPB is holding its annual Big Garden Birdwatch in a little under two weeks. If you can, please get involved and support this effort. It’s fun, and the data you collect will help improve our understanding of the state of wild birds in the UK.
Sign-up is free and easy. Please go to the RSPB website or via this link https://www.rspb.org.uk/whats-happening/big-garden-birdwatch
This is a fun activity to do with family or friends over the watch weekend.
Crucial wildlife habitat along the River Ivel is disappearing at an alarming rate due to urban development. Spotting and reporting the different bird species in your garden is vital to understanding how loss of habitat impacts the bird population.
On a positive note – A Kingfisher was spotted last Saturday morning on the Ivel at Stotfold Mill!
Thank you.
A fun, free, and easy way to help rivers – The Big River Watch app.
Twice a year, the Rivers Trust run a “Big River Watch” survey, and the next one will take place in Spring 2026. Anyone can take part in these week-long citizen science surveys that help to build an important picture of river health across the UK and Ireland.
If interested please visit The Big River Watch website at https://theriverstrust.org/take-action/the-big-river-watch
Above is a screenshot of data from the most recent Big River Watch of the River Ivel catchment area. Seven surveys were completed in September 2025.
Important – If you plan to get involved in The Big River Watch program in 2026, please take time to study the Pollution and Wildlife Identification Guides (available on the The Big River Watch website). It is really important to be accurate when surveying a river as the data you produce is critical in creating a snapshot of the health of that river.
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The Herts & Middlesex Wildlife Trust are holding their annual Water Vole & Invasive Non-native Species (INNS) conference, at Welwyn Civic Centre on the 12th November 2025 (6pm-9pm).
This event is free. If you would like to attend, please register here:
https://www.hertswildlifetrust.org.uk/events/hertfordshire-and-middlesex-water-voles-and-invasive-non-native-species-2025
Every month, a dedicated group of RevIvel volunteers conduct a riverfly survey of the upper River Ivel. The lastest October 2025 survey results are very encouraging.
The abundance of caddisfly larvae is a good sign of water quality. And what appeared to be a Bullhead fish was spotted!
Everyone involved in the surveying work has undergone specific training. All wildlife surveyed are unharmed and carefully released back to the River Ivel. Survey results are shared with the Herts & Middlesex Wildlife Trust.
Please come along to the Stotfold Mill Steam Fair this weekend (4th/5th October 2025).
Stotfold Mill is linked to the upper River Ivel. The waters of the river powered the mill through its working life. This weekend you will be able to see the mill in operation again, together with an impressive selection of working steam engines.
Please come along and say hello to RevIvel. We will have a stand at the fair.
Link to the fair is here: https://www.stotfoldmill.com/working-steam-2025/