NymphIso Iso Baby
The Iso Iso Baby is a detailed and realistic imitation of an Isonychia nymph, one of the larger and more prolific mayflies. Its dark body, large white rubber legs, and distinctive markings make it a highly visible and irresistible target for trout.
Summer, Fall
Advanced
Trout
Overview
A modern Isonychia nymph imitation tied Euro-style with dark dubbing, thin ribbing, a tungsten bead, and sometimes rubber legs. It rides hook-up and gets down fast—ideal for late summer and fall Iso hatches in fast water.
Pattern Characteristics
Materials
Hook: Dai-Riki 300, size #10-#12.
Thread: 8/0 or 70 Denier, black.
Tail and post: Deer hair, cleaned and stacked.
Dubbing: Isonychia dry-fly dubbing.
Hackle: Medium dun.
Legs: Barred round rubber legs.
Thorax: Isonychia dry-fly dubbing.
Fishing Tips
Season
Summer and Fall, during Isonychia hatches.
Presentation
Dead drift along the bottom or in the middle of the water column.
When to Use
This pattern is particularly productive during Isonychia hatches, but can also be effective whenever mayflies are present.
Water Type
This fly is best suited for moving water.
Rigging Suggestions
Try using it as the point fly in a multi-fly rig, with a smaller nymph or emerger pattern trailing behind.
Visibility & Floatation
The dark body and large white legs make this fly highly visible underwater. It is designed to sink and imitate a nymph.
