Isonychia Dry Fly #12 – Traditional Catskill Style Slate Drake

A traditional Catskill-style Slate Drake dry fly designed to ride high on the water and imitate adult Isonychia mayflies. A classic trout pattern for fishing during Slate Drake hatches on rivers and streams.

Description

The Traditional Catskill Isonychia Dry Fly is a classic high-floating mayfly imitation designed for trout feeding on adult Slate Drakes.

Unlike low-riding Comparaduns and cripple patterns, this traditional dry fly is designed to sit high on the surface, providing a clear adult mayfly profile that is easy for anglers to see and track through the current.

The Isonychia hatch is an important part of the trout fishing season on many northeastern rivers, including the Upper Delaware system. When these larger mayflies are emerging and returning to the water, trout can become focused on feeding opportunities associated with the hatch.

This traditional Catskill-style pattern gives anglers a dependable adult imitation to present to rising fish.

Why Fish the Traditional Catskill Isonychia?

A high-floating dry fly has several advantages. It is easier to follow in broken water, provides a distinct silhouette, and offers a traditional adult mayfly presentation when trout are feeding on the surface.

This pattern is a useful contrast to crippled dun and surface-film imitations when trout are taking fully emerged adult Slate Drakes.

When to Fish It

Fish this pattern during Isonychia or Slate Drake activity when trout are rising to adult mayflies. It is particularly useful in riffles, runs, and other moving water where a high-riding dry fly is easier to track.

How to Fish It

Present the fly with a drag-free drift through likely feeding lanes. Focus on current seams, riffles, and rising fish. Keep the fly riding high and visible, and use a floatant appropriate for traditional hackled dry flies as needed.

Capt. Ken’s Guide Tip

Carry more than one style of Slate Drake imitation. When trout are feeding on fully emerged adults, a traditional high-floating Catskill dry fly is an excellent choice. When they begin refusing it, switch to a lower-riding Comparadun or cripple pattern to match a different stage of the hatch.

Details

• Pattern: Traditional Catskill Isonychia Dry Fly

• Imitates: Adult Slate Drake mayfly

• Scientific classification: Isonychia spp.

• Fly type: Traditional Catskill-style dry fly

• Presentation: High-floating adult mayfly imitation

• Hook: Standard dry fly hook

• Hook size: #12

• Target fish: Trout

• Applications: Slate Drake hatches, river and stream dry-fly fishing

Fish the Slate Drake Hatch with a Classic Catskill Pattern

When trout are rising to adult Slate Drakes, give them a traditional high-floating mayfly imitation. Capt. Ken’s Isonychia Dry Fly is a classic addition to your trout dry-fly box and a useful alternative to lower-riding emerger and cripple patterns.

Add this Catskill-style Slate Drake dry fly to your selection and be prepared for the Isonychia hatch.