Low water? High pressure? Flat calms? Bring it on.
The Arndilly Fancy was born for stealth on skinny rivers — but its finesse makes it equally dangerous on stillwaters when trout get cagey or conditions go glass-smooth.
Fish it as a single fly to ultra-spooky fish, or run it on a dropper above a heavier pattern when you need a natural, low-impact presentation.
When subtlety is the only thing keeping you in the game, this fly earns its place.