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Fly Fishing Nymph

New York: East Branch Delaware River Hatch Chart

FlySizeJanFebMarAprMayJunJulAugSepOctNovDec
Black Stonefly12 - 18             
Brown Stonefly12 - 14             
Little Black Caddis16 - 18            
Grannom12            
Gray Caddis14 - 16            
Olive Caddis14 - 16            
Blue Quill14             
Blue Winged Olive14 - 18         
Quill Gordon12 - 14             
Apple Grannom Caddis16             
Hendrickson12 - 14             
Red Quill12 - 14             
Slate Drake12 - 14         
Tan Caddis14             
Blue Winged Olive20 - 28        
Brown Drake10 (2XL)             
Gray Fox12 - 14             
Green Drake8 - 10 (2X             
Light Cahill12 - 14           
March Brown10 - 12             
Sulphur14 - 20          
Eastern Salmon Fly4 - 8 (2XL            
Golden Stonefly10          
Great Brown Stonefly6 - 10 (2X          
Light Cahill14 - 16             
Yellow Drake10 (2XL)             
Terrestrials (various)16 - 22         
Trico24            
White Fly12 - 14           
Ginger Caddis10 - 12           
Click Fly Name to see patterns that imitate it.