When does the Black Sedge hatch?

May–June, typically 14:00–20:00. It starts from about 9°C, peaks around 13°C and tails off by 18°C.

What flies imitate the Black Sedge?

Silver Sedge, Black Gnat, Elk Hair Caddis, typically on a #16–14 hook.

How big is the Black Sedge?

Adult stage: 6–9mm. That matches a #16–14 hook.

Caddis · Aquatic insect

Black Sedge

Silo nigricornis

Size

6–9mm

Hook size

#16–14

Hatch window

Season May–JunePeak time 14:00–20:00

Water temperature

13° peak

9°18°

How fish feed on it

Small, dark and easily written off as a black gnat from a distance, which costs people fish. Summer evenings on stony rivers. Size is doing most of the work here — get that right and the exact pattern matters less than usual.

Flies that imitate this

Silver Sedge

Black Gnat

Elk Hair Caddis

Ecology

Rivers & stillwater

Where you'll find this

British IslesPresent
IberiaPresent
The AlpsPresent
ScandinaviaPresent
Continental EuropePresent
Atlantic fringePresent

Present throughout

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