Fly Fishing Trout Fly
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Fly Fishing Nymph

Colorado: Delaney Butte Lakes Hatch Chart

FlySizeJanFebMarAprMayJunJulAugSepOctNovDec
Midges (various)12 - 18     
Scud12 - 16     
Streamers (various)2 - 10     
Caddis (various)10 - 16           
Callibaetis12 - 16          
Damselfly8 - 12           
Blue Winged Olive16 - 20            
Click Fly Name to see patterns that imitate it.