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NymphDouble Standard

The Double Standard is a versatile and effective streamer pattern that mimics a variety of baitfish. It's two-tone body and articulated design give it a lifelike movement in the water, making it irresistible to predatory fish.

Season
Spring, Summer, Fall
Difficulty
Intermediate
Target Species
Trout
Updated
Apr 2025
Double Standard fly pattern - imitates Nymphs tied for Trout

Overview

A hybrid nymph that combines the slender, segmented abdomen of a Pheasant Tail with the buggy thorax of a Hare's Ear. It's tied with pheasant tail fibers in back, hare's mask dubbing up front, and finished with a gold bead for weight. A simple, durable pattern that covers multiple food forms.

Materials

Hook: Tiemco 5262, size #2-#6

Hook: Standard nymph hook, sizes #12–#18

Bead: Gold tungsten bead (size to match hook)

Thread: Brown 6/0 or 8/0

Tail: Pheasant tail fibers

Ribbing: Fine gold wire

Abdomen: Pheasant tail fibers

Thorax: Hare's ear dubbing

Wingcase: Pheasant tail fibers

Legs: Optional – partridge or pheasant tail fibers

Behavior & Presentation

Natural Behavior: Generalist nymphs occupy diverse habitats from riffles to pools, exhibiting variable behaviors from clinging to active crawling based on current. Their opportunistic feeding creates consistent drift availability throughout daylight hours.

Where Trout Eat It: Tumbling near bottom in runs, tail-outs, and pocket water where diverse nymphs drift opportunistically.

How to Fish It: Dead drift with high-stick techniques, maintaining bottom contact through natural tumble zones.

Best Water: Search runs, tail-outs, and riffle edges where generalist nymphs concentrate in feeding lanes.

Strike Type: Watch for indicator dips or subtle line hesitation signaling interception of drifting nymphs.

Fishing Strategy

Rigging Suggestions: Use as a dropper 18-24 inches below a dry fly indicator, or in a tandem nymph rig with a heavier fly as anchor. Use 5X or 6X tippet.

Seasonal Timing: Effective throughout and from April through October, with peak productivity during May-June and September when mayfly hatches are most consistent.

Pro Tips: The tungsten bead ensures quick descent to feeding zones. Natural tones provide subtle realism that selective trout find convincing in clear water. The slim profile allows for natural drift and quick penetration through the water column.

Entomology

Generalist nymphs occupy diverse stream habitats from riffles to pools, exhibiting variable behavior patterns from clinging to active crawling depending on species and current velocity. Their opportunistic feeding and movement patterns result in consistent drift availability throughout daylight hours. Fish feed on these nymphs because their predictable presence across multiple microhabitats means they're always available as prey, making them reliable searching patterns when no specific hatch is occurring and fish are feeding opportunistically.

Organism Type
insect
Life Stage
nymph

Pattern Characteristics

Intermediate Difficulty
Trout
Moving Water
Spring
Summer
Fall
Imitates: Nymphs
Worldwide
dead-drift
indicator-nymph
baetis-hatch
searching-pattern
low-clear-water