When does the Caddis hatch?

November–April, typically 18:00–22:30 (evening emergence & egg-lay). It starts from about 9°C, peaks around 15°C and tails off by 21°C.

What flies imitate the Caddis?

Elk Hair Caddis, Deer Hair Sedge, G&H Sedge, typically on a #14–12 hook.

How big is the Caddis?

Adult stage: 8–12mm. That matches a #14–12 hook.

Caddis · Aquatic insect

Caddis / Sedge

Nectopsyche

Size

8–12mm

Hook size

#14–12

Hatch window

Season November–AprilPeak time 18:00–22:30 (evening emergence & egg-lay)

Water temperature

15° peak

9°21°

How fish feed on it

Adult insects on the water are inefficient — a caddis skittering to lay eggs, a stonefly blundering about after crawling out, neither built for elegance. Trout treat it as an easy meal and a bit of theatre at once, chasing a moving fly with more enthusiasm than they'd ever give a still one. Movement is the tell; a static adult imitation often just sits there unloved.

Flies that imitate this

Elk Hair Caddis

Deer Hair Sedge

G&H Sedge

Ecology

Rivers & stillwaterFreestone riversSpate rivers

Where you'll find this

New ZealandPresent

Present throughout

About the genus Nectopsyche

Nectopsyche is a genus of white millers in the family Leptoceridae. There are at least 50 described species in Nectopsyche .

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