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The Malham Sedge! Agrypnetes crassicornis (McLachlan)
We are pleased to announce that Sharon and Peter Flint have found the Malham Sedge, Agrypnetes crassicornis (McLachlan) in Malham Tarn as part of their work into the Caddisflies, Mayflies and Stoneflies of the Malham NNR. The larvae was found on the 17th of June in the Charaphyte beds in the tarn. 
The Malham sedge, a Caddisfly has not been seen for a number of years and the BBC, along with Dr Ian Wallace went along to Malham Tarn in 2011 to investigate and see whether they could find the elusive sedge. Please see the link below. 
The Natural England Access to Evidence reports on the Status of Caddisflies and the report on the status of Mayflies in Great Britain are now available here
Great News, The Field Studies Council at Malham Tarn will be running a course on Identifying and recording Adult Caddisflies, Stoneflies and Mayflies in 2017. The course is being run by Sharon and Peter Flint. Sharon is YNU County recorder for these three taxa and both Peter and Sharon are authorities on the Caddis fauna on the Malham NNR. The course will run from Friday 26 July to Monday 21 July 2017, details can be found here :
This course is being run as part of  the Freshwater Section initiative to increase our recording of Mayflies, Stoneflies and Caddisflies in their adult stage and is open to everyone, including moth trappers, anglers and anyone interested in the ecology of these groups.


Latest Freshwater Section News

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  2. Plant and beetle lists for Blackmoorfoot Reservoir now available

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  3. The Chinese Mitten Crab (Eriocheir sinensis)

    An exotic addition to Yorkshire’s aquatic fauna.

  4. White Clawed Crayfish

    In Britain the white-clawed crayfish is our only native crayfish and is our largest freshwater invertebrate. It...

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StoneStoneflies, belonging to the Insect order Plecoptera, are so called because the adults of th


Mayfly recording in Yorkshire


Caddisflies or Trichoptera, (meaning, from the Greek trichos a hair and pteron a wing; hairy-wing


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Recording in freshwater habitats