A dry fly, tied #10–12, a summer pattern.
It is tied against 2 named insects in this
book — June–August.
#10–12Hook size
dry flyType
SummerSeason
2Hatches matched
What it looks like
A drawing, not a photograph, and not traced from one. Its proportions were read off
5 independent reference photographs of the pattern and written down as
5 measured characteristics — wing angle, tail length against the shank,
how far a hackle fibre reaches — every one of which had to hold across more than one of them
before it could be drawn. What survives across many photographs of a fly is the fly.
A big pale yellow mayfly, and on the rivers where it comes off it is the only thing that size in the air. Fished at dusk, like every large drake.
Drawn at #12 — 14.0 mm of shank and
5.0 mm of gape on a Tiemco 100.
The bare hook at every size this pattern is tied in, all to the same scale. There is no
industry standard behind a hook number, so these are Tiemco 100
measurements and another maker's 10 will differ a little.
What it imitates
Each of these is the same hatch record the app's own panel reads, so a pattern
recommended on a river card in the app is recommended for one of the insects below.
In tying order. This dressing is the standard one — these patterns have been in the publicrecord for decades — and materials
substitute freely: the proportions and the silhouette are the pattern, not the brand of
dubbing.
Hook
Long-shank dry-fly hook, sizes 10–12
Thread
Yellow 6/0
Tail
Three moose or pheasant fibres
Body
Pale yellow dubbing, lightly ribbed
Wings
Barred wood-duck or mottled turkey, upright
Hackle
Cream and ginger, mixed
When to fish it
Full dark on summer evenings. You will not see it — fish it by ear and set on the sound of the take.
A summer pattern. The insects it matches are active june–august, in water from
58°F to
72°F.
Target species
Trout
Rivers it fishes well
Rivers with a page here that sit in the regions where the insects this pattern imitates are
recorded. It is a claim about coverage, not a report of a fish caught.