Riverfly Monitoring - how you can help

"Life in the Leeds Becks"

Riverfly Monitoring is our flagship citizen science project. Our volunteer monitors sample river bugs at agreed locations around the River Aire catchment to assess the effects of pollution on life in the river.

Riverfly populations are one of the key indicators of long-term river health problems, as the insects living in the river fall quickly if pollution is present and take a long time to recover after a pollution event.

In 2025, with the support of LNER who are funding the project, we set out to recruit new volunteer Riverfly Monitors to monitor rivers and becks in North Leeds. Read on to find out more about the project .

LNER logo
During Summer 2025 we set out to work with environmental groups across North Leeds to recruit and train volunteers to monitor Riverfly populations. With the aim of assessing the impact of urban pollution on the river life across Leeds we discovered in our 2025 North Leeds Outfall Safari https://aireriverstrust.org.uk/outfall-safari-leeds/ You can read more about the project in this project proposal document  Life In The Leeds Becks Project Introduction  Then if you are interested  to find out more, please get in touch with our Citizen Science Officer at contact@aireriverstrust.org.uk   New volunteer recruitment for the project is closed but we will be looking to sample other areas along the River Aire in the future. Keep checking back with our website for updates as these projects start and create new citizen science volunteering opportunities.
Map of North Leeds showing becks

The project looks to assess the river bug life along the following streams in North Leeds: 

  • Carlton/Mosley Beck – Horsforth 
  • Meanwood & Adel Beck 
  • Gledhow Beck 
  • Great Heads Beck – Roundhay  

Our volunteers are trained to a standard agreed by The Riverfly Partnership, thus ensuring consistency and accuracy, and received a Certificate of Competence demonstrating their achievement.

Have a read of our guide to becoming a Riverfly Monitor with the Aire Rivers Trust.

The Riverfly Partnership logo - an illustration of a stonefly with the words below it.

The video to the right provides a mid project update of our work with LNER and our partner organisations .

 You can view the interim results via the Riverfly Partnership’s Data Hub here https://riverflydata.org/  We hope to report the results of this project in March 2026 so check back in then, to see our findings.  


© Copyright Aire Rivers Trust 2020
The Aire Rivers Trust is a company limited by guarantee registered in England and Wales No: 07464227 and a Registered Charity No: 1145609
Registered Office at: Bizspace, Albion Mills, Albion Road, Bradford BD10 9TQ
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