Flav – (Drunella flavilinea)
The Flav fly imitates a small western green drake (sizes 14-16) mayfly and is called Flav due to its scientific name. From late June through July, this is an important food source for trout.
They have a greenish or brownish olive body and dark gray wings. They prefer moderately fast currents and don’t live in slow water. Trout key in on these even though their hatches are often sporadic, and a feeding frenzy can ensue for their short hatch times.
Flavs emerge during cloudy days and are often confused with their larger cousins, the western green drake or their much smaller cousins the BWO, but their size sits in between these two other common hatches, so keep that in mind if other mayfly patterns aren’t working.
It is most important to have nymphs, emergers, and cripples since the adults hatch slowly offering trout easy access to food without much effort. The upper Madison and Henry’s Fork rivers have excellent Flav hatches in June. The evening spinner fall near $3 Bridge on the Madison River brings some exceptional trout to the surface as the sun sets.
Top 5 Flav Flies For Fly Fishing in Montana
