09/10/2026
We’ve been over in North Yorkshire this morning, practicing our Riverfly ID and counting methods!
All of these larvae were in just a small stretch of Beck and carefully extracted using kick-sampling into a net and then rinsed into trays to be counted.
We had a good score for this waterbody despite the temperature drop and some ongoing pollution concerns, but unfortunately numbers of these invertebrate can plummet after a single larger pollution event…Which is bad news for our rivers and everything that lives in them. Regular counting like this, helps us to find problems before they escalate.
If you’d like to find out more about these marvellous creatures and how you could become a Riverfly surveyor, head to 🦟