Caddis · Aquatic insect
Marbled Sedge
Hydropsyche contubernalis
Size
8–12mm
Hook size
#14–12
Hatch window
Season June–SeptemberPeak time 14:00–20:00
Water temperature
15° peak
11°22°
Hatches from 11°C, peaking at 15°C, tailing off by 22°C.How fish feed on it
Green-bodied and on the water through the afternoon and evening across most of the summer — an unglamorous, dependable sedge rather than a headline hatch. On lakes you'll only find it near stony inflows, because the larva needs current to feed at all.
Flies that imitate this
Silver Sedge
CDC Sedge
Ecology
Where you'll find this
- British IslesPresent
- IberiaPresent
- The AlpsPresent
- ScandinaviaPresent
- Continental EuropePresent
- Atlantic fringePresent
Present throughout