Halesus radiatus (Curtis, 1834)
FW length 17-23 mm.
There are only 8 species of this genus Halesus in Europe, and only 2 in Britain. They are known as the angler’s Caperers. They can be very hard to separate without close scrutiny of the genitalia.
The dark speckling between the forks in the veins help to form well-defined pale streaks compared to Halesus digitatus.
Found in streams, rivers and lakes. The adult flies July to August. Common and widespread throughout.
Identification of species reconfirmed by an expert at iRecord.