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Oregon: Williamson River Hatch Chart

FlySizeJanFebMarAprMayJunJulAugSepOctNovDec
Black Drake10 - 12          
Caddis (various)16 - 18      
Green Drake10 - 12            
Midges (various)14 - 18      
Streamers (various)6 - 14      
Pale Morning Dun16 - 18            
Grasshoppers8 - 12           
Ants14 - 16           
Hexagenia4 - 8           
Pale Evening Dun16 - 18            
Trico20 - 24         
Callibaetis16 - 18           
Blue Winged Olive16 - 18           
Brown Quill16 - 20           
October Caddis6 - 8            
Click Fly Name to see patterns that imitate it.