When does the Cased Caddis hatch?

October–April, typically 12:00–dusk. It starts from about 8°C, peaks around 14°C and tails off by 20°C.

What flies imitate the Cased Caddis?

Horn Caddis, Cased Caddis Larva, Hare & Copper Nymph, Creeper Nymph, typically on a #16–14 hook.

How big is the Cased Caddis?

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

Caddis · Aquatic insect

Cased Caddis / Creeper

Olinga feredayi

Size

6–9mm

Hook size

#16–14

Outside the hatch

Nymphs are in the water all year, long before and after the hatch window — the season and temperature figures on this card describe when the adults emerge, not when this stage is available. It very nearly always is.

How fish feed on it

It hauls a case of sand grains and stick around with it, which makes it slow, clumsy and utterly committed to the bottom. Trout take the lot, case included, and a fish grubbing over gravel is very often doing exactly this. Fish it deep and slow — and soft, if you can: a rigid fly gets ejected fast, where something yielding is held long enough to hook.

Flies that imitate this

Horn Caddis

Cased Caddis Larva

Hare & Copper Nymph

Creeper Nymph

Ecology

Rivers & stillwaterFreestone riversSpate riversTolerates poor water

Where you'll find this

New ZealandPresent

Present throughout

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