Thank you to everyone who joined us at the Riverfly Conference 2025!

A big shout out to all of our speakers, and to Steve and Rebecca for brilliantly chairing the morning and afternoon sessions. 👏

Presentation slides are on our website:

👉https://www.riverflies.org/newsblog/riverfly-conference

Thank you to everyone who joined us at the Riverfly Conference 2025!

A big shout out to all of our speakers, and to Steve and Rebecca for brilliantly chairing the morning and afternoon sessions. 👏

Presentation slides are on our website:

👉https://www.riverflies.org/newsblog/riverfly-conference

💧Crayfish Guidance!

In England's rivers we have both native and invasive non-native species of crayfish.

👀 They are pretty hard to tell apart. Learn what to do and not to do if you come accidentally come across one in your Riverfly sample.

👉231027+Riverfly+Guidance+VB.pdf

🪰 Freshwater Friday - Flat-bodied stone-clingers (Heptageniidae)

Larvae in this family of mayflies have a flattened shape, which is perfect for clinging to rocks in fast-flowing streams.

If you spot them, it’s a good sign of a healthy river.

#FreshwaterFriday #Riverfly #Heptageniidae

Beware the creepy-crawlies of the river... 👻

This Halloween, we’re shining a spooky spotlight on the creepy-crawly creatures living just beneath the surface - riverfly invertebrates 👀

🎃Mayflies
🎃Stoneflies
🎃Caddisflies

Their presence tells us if our waters are clean or haunted by pollution 💀

📊 Our September data roundup is here!

👏 Riverfly volunteers submitted a huge 821 surveys across the UK — thank you for every single one.

💙 This work is supported by our amazing funders at the Environment Agency and @esmeefairbairn.bsky.social.

👉https://www.riverflies.org/riverflyreports

✨ Freshwater Friday spotlight: Damselflies! ✨

Part of our Extended Riverfly family, damselflies are slender, agile hunters that spend most of their lives underwater as larvae. 💦

#FreshwaterFriday #RiverflyPartnership #CitizenScience #Damselflies #FreshwaterInvertebrates

💧Ever wondered what your RMI scores would look like in a pristine river? 🏞️

👉 Find out more in the replies below.

🎥 Riverfly Quiz Time! 🐛

Can you guess this riverfly? 👀
Look closely... those tufted gills on the abdomen are a big clue!

💬 Think you know? Drop your answer in the comments!

#Riverfly #FreshwaterInvertebrates #CitizenScience

🐛 Freshwater Friday: Blue-winged Olive 💧

Blue-winged Olive numbers have dipped — but don’t worry! It’s a normal seasonal change.

Adults emerge in summer, and their eggs wait until spring to hatch. 🌿

📊 Find out more in our Riverfly reports: www.riverflies.org/riverflyrepo...

In August 2025, our Riverfly monitors submitted an incredible 882 of surveys across the UK. 📊

👏 Thank you to every volunteer who headed out with a kick net last month.

Supported by our funders: Environment Agency and @esmeefairbairn.bsky.social.

👉 www.riverflies.org/riverflyrepo...

🚨Demon shrimp alert!
This invasive non-native species, first recorded in the UK in 2012, is spreading fast and threatening our freshwater wildlife by out-competing and preying on native invertebrates.
📲 Report sightings to innsmapper.org & your group co-ordinator
🧽Always Check, Clean, Dry your kit

Nature’s little builders 🌿 In August, some of our monitors found as many as 1000 cased caddis in their sample!
Caddis larvae make protective cases from twigs, sand, and stones. Each one is unique!
#FreshwaterFriday #Caddisfly #FreshwaterInvertebrates

Riverfly data in action! 💧

At Stadhampton Mill, a new bypass channel has reconnected 3.25 km of chalk stream habitat. Early RMI scores are strong (10s) & stoneflies are back - rare for the catchment! 🐟🌱

Read more:
www.riverflies.org/case-studies...

#Riverfly #DataInAction #ChalkStreams