Known across the East Coast as Slate Drakes, Iso Mayflies, or by the long winded angler as Isonychia, these mayflies are a very important trout food in the waters they inhabit. Excellent swimmers, these long bodied Iso nymphs move freely across the bottom of the stream and are actively pursued by trout throughout the 363 days they spend in their nymph life cycle. If you are looking for a proven pattern that will produce when fish are feeding on slate drake nymphs, look no further than our Isonychia Nymph!
Dry/Wet: Wet
Fly Category: True-Fly Pattern
Family: Mayflies
Species: Slate Drake
Life Stage: Nymph, Emerger
