Michigan Flies

Flies / Nymph

Isonychia Nymph

A

The fished stage of the Isonychia on Michigan rivers, since the strong-swimming nymphs migrate to the bank to crawl out. Swing or twitch it through cobble riffles in the evening from June to September on the Au Sable, Upper Manistee, Boardman and Muskegon.

#8–12Dark brown with pale dorsal stripe
What the pattern looks like
Reference photos of the Isonychia Nymph tied by others, shared by their photographers. Not our flies; our own product photos replace these as they are shot.

Photo © Quinn for Fly Deal Flies, used with permission · Isonychia Nymph

Season
Months this pattern is in play across Michigan, derived from what it imitates.
  1. Jan
  2. Feb
  3. Mar
  4. Apr
  5. May
  6. Jun
  7. Jul
  8. Aug
  9. Sep
  10. Oct
  11. Nov
  12. Dec
Imitates

The naturals

Fish it for
Brown troutBrook troutRainbow trout (resident)

Setups

  • Indicator nymphing
  • Euro / tight-line nymphing

Sources