Cyrnus trimaculatus
Length 6 to 9 mm. The wings appear dark brown mottled with pale yellow, but very variable.
At the edge of still and slow flowing water. It is also attracted to light.
May to September.
Mostly carnivorous. The development of the larvae takes place in water. They build nets with funnel-shaped opening, which are usually attached to aquatic plants.
Widespread and fairly frequent throughout Britain.
Fairly frequent in Leicestershire and Rutland.
Graham Calow
Sapcote garden1
24 August 2013
female - specimen examined
Graham Calow
Sapcote garden1
06 June 2013
male - specimen examined
Graham Calow
Fosse Meadows, Sharnford
21 May 2014
male - specimen examined
Karaokeking19
Broughton Astley Garden
09 May 2024
Adam Poole
Broughton Astley Garden
24 June 2024
Male genitalia
Karaokeking19
Broughton Astley Garden
09 May 2024
Female genitalia
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Species profile
- Species group:
- Caddisflies
- Kingdom:
- Animalia
- Order:
- Trichoptera
- Family:
- Polycentropodidae
- Records on NatureSpot:
- 26
- First record:
- 19/06/2011 (Calow, Graham)
- Last record:
- 24/06/2024 (Poole, Adam)
Total records by month
% of records within its species group
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Graham Calow
Sapcote garden1
07 June 2013
male - specimen examined
