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Fly Fishing Nymph

Massachusetts: Swift River Hatch Chart

FlySizeJanFebMarAprMayJunJulAugSepOctNovDec
Midges (various)20 - 28 
Little Black Caddis18 - 20            
Gray Caddis12 - 16            
March Brown10 - 12             
Sulphur16            
Tan Caddis12 - 14            
Blue Quill16             
Light Cahill14           
Golden Drake12             
Terrestrials (various)6 - 18            
Click Fly Name to see patterns that imitate it.