The Hairwing, known as the Comparadun nowadays, plants the body firmly on the water. Correctly proportioned and tapered, the body profile itself becomes the primary trigger.
The Comparadun is one of the most effective flies for picky, rising trout and this variation imitates one of the most common insects found on trout rivers everywhere.
The Blue Winged Olive (BWO) is not a single species, but a group of them in the genus Baetis. There are many mayflies out there with olive bodies and gray- or dun colored wings, the key during a Blue-Winged Olive hatch is to get the size right.