When is the Corixa (Water Boatmen) most available to trout?

January–December, typically All day. It picks up from about 4°C, peaks around 14°C and tails off by 22°C.

What flies imitate the Corixa (Water Boatmen)?

Corixa, Gold-Bead Corixa, Pheasant Tail Nymph, Silver Invicta, typically on a #14–12 hook.

How big is the Corixa (Water Boatmen)?

Adult stage: 12–15mm. That matches a #14–12 hook.

Aquatic bug · Aquatic insect

Corixa (Water Boatmen)

Corixa punctata

Size

12–15mm

Hook size

#14–12

Always there

No hatch and no season — this is in the water every month of the year, so it's always a fair bet when nothing is showing on top.

How fish feed on it

It rows about in the shallows with a bubble of air held under its body, which is what gives it away — a small, purposeful, jerky movement rather than a drift. Trout take them with intent. Fish an imitation in short pulls with pauses, close to weed and margins, and let it rise between pulls the way the real thing does.

Flies that imitate this