The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
Electrogena lateralis is a common, though localised species in Scotland, Wales and the North and South West of England. Nymphs of this species are typically found in riffle areas of rivers and streams, although they can also occasionally be found on the wave-lashed shores of standing waters.