Caddis · Aquatic insect
Silverhorns & Longhorns
Mystacides longicornis
Size
6–9mm
Hook size
#16–14
Hatch window
Season May–SeptemberPeak time 18:00–22:00
Water temperature
16° peak
11°22°
Hatches from 11°C, peaking at 16°C, tailing off by 22°C.How fish feed on it
The grouse wing, and the stillwater angler's late-summer evening. It hatches through the afternoon but flies at dusk, when the swarms over big lakes in settled weather get genuinely dense — long antennae, jinking flight, and fish smashing at them in the last of the light. Settled weather is the condition to watch: an unsettled evening produces very little.
Flies that imitate this
Silverhorn Sedge
CDC Sedge
Ecology
Where you'll find this
- British IslesPresent
- IberiaPresent
- The AlpsPresent
- ScandinaviaPresent
- Continental EuropePresent
- Atlantic fringePresent
Present throughout