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Midge / EmergersRosenbaur's Rabbit Foot Emerger

A highly effective emerger pattern designed by Tom Rosenbaur. The rabbit foot wing imitates the emerging wings of a mayfly, and the slim body and bead help it sink to the right depth.

Season
Spring, Summer
Difficulty
Intermediate
Target Species
Trout
Updated
Apr 2025
Rosenbaur's Rabbit Foot Emerger fly pattern - imitates Mayflies tied for Trout

Overview

Rosenbauer's Rabbit Foot Emerger is a refined take on the classic emerger, featuring a snowshoe rabbit foot wing for superior floatation and visibility. Variants often adjust body color, dubbing type, or add a trailing shuck to better match local mayfly species and water conditions.

Materials

Hook: Firehole Sticks 316, size #16–#20
Thread: Olive Ultra Thread 70 denier
Body: Olive dubbing
Ribbing: Fine gold wire
Wing: Natural rabbit foot fur
Head: Gold bead to match hook size

Behavior & Presentation

Natural Behavior: Mayfly emergers struggle to break through the surface film during hatches, many becoming trapped with trailing shucks. These vulnerable insects drift helplessly in the current, unable to fly or dive to safety.

Where Trout Eat It: Fish sip emergers hanging in surface film or just subsurface during mayfly hatches on the Lamar River and Beaverkill. Trout target these vulnerable insects trapped in transition zone between nymph and adult during PMD, BWO, and March Brown emergences when fish become highly selective.

How to Fish It: Fish in film with greased leader to within 6 inches of fly, or deep with split shot. The snowshoe rabbit wing provides natural buoyancy keeping it suspended at perfect depth (abdomen/shuck below surface, wing visible above). Use as top fly in tandem rig or 18-24 inches below visible dry on 5X-6X tippet.

Best Water: Target tail-outs, seams along weed edges, and foam lines in slow glides. Focus on current breaks and eddy lines where emergers concentrate during hatch windows.

Strike Type: Fish sip the pattern with barely perceptible surface disturbance, targeting the snowshoe rabbit wing floating above the film; gentle hook-set prevents leader failure on fine tippets during selective feeding.

Fishing Strategy

Rigging Suggestions: Use as top fly in tandem nymph rig, or 18-24 inches below a visible dry fly on 5X or 6X tippet. 9-12 foot leader recommended.

Seasonal Timing: April through June and September through October during mayfly hatches, particularly effective for PMD, BWO, and March Brown emergences.

Pro Tips: This pattern excels when trout are "in the film" refusing fully emerged dries. The rabbit foot wing provides natural movement and buoyancy while maintaining a low profile. Grease leader to within 6 inches of fly to keep it suspended at the perfect depth.

Entomology

Mayfly nymphs transitioning to adulthood exhibit erratic swimming behavior as they struggle to break free from their nymphal exoskeletons while hanging in or just below the water's surface film. Fish become highly selective during these emergence windows because the trapped insects are completely vulnerable and appear in concentrated numbers during specific hatch periods, creating reliable feeding lanes in current seams.

Order
Ephemeroptera
Common Name
Mayfly
Organism Type
insect
Life Stage
general

Pattern Characteristics

Intermediate Difficulty
Trout
Moving Water
Spring
Summer
Imitates: Mayflies
Rocky Mountain
Northeast
Lamar River (Yellowstone)
Kootenai River
Willowemoc Creek
Beaverkill River
dead-drift
baetis-hatch
classic