Fulling Mill Blue Wing Olive (BWO)

The hatch worth being ready for

Small olive duns are the hatch that most rewards being prepared for. When they come off in numbers the fish lock onto them and stop looking at anything else, and a box full of good general patterns suddenly counts for nothing. This is the standard hackled version, tied to cover that group of small olive-bodied duns rather than one particular insect. Fish it dead drift through a rise and change size before you change pattern.