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Fly Fishing Nymph

Oregon: McKenzie River Hatch Chart

FlySizeJanFebMarAprMayJunJulAugSepOctNovDec
Blue Winged Olive16 - 22         
Little Black Stonefly16 - 20           
Brown Stonefly8 - 12         
March Brown10 - 16         
Golden Stonefly8 - 12        
Salmon Fly4 - 8        
Caddis (various)8 - 18        
Green Caddis8 - 12          
Little Yellow Stonefly14 - 18        
Pale Morning Dun16 - 20        
Yellow Drake12 - 14        
Green Drake8 - 12          
Attractors (various)10 - 16       
Gray Drake8 - 12          
Mahogany Dun14 - 18           
October Caddis6 - 8          
Click Fly Name to see patterns that imitate it.