Fly Fishing Trout Fly
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Fly Fishing Nymph

Oregon: Owyhee River Hatch Chart

FlySizeJanFebMarAprMayJunJulAugSepOctNovDec
Caddis (various)12 - 18 
Brown Stonefly10 - 12         
Scud10 - 16      
Tube Worm12 - 14      
Callibaetis14 - 18        
Mahogany Dun14 - 18        
Ants10 - 12         
Beetles8 - 12         
Grasshoppers8 - 12         
Pale Evening Dun16 - 18         
Click Fly Name to see patterns that imitate it.