Blue Winged Olive
(Baetis several species)
Two tails. Light to medium olive/gray body with light to medium gray wings.
Timing of Hatches
Mid-March through early May during afternoon hours and in the mid-summer around dusk & September through October during afternoon hours
Widespread on most sections of the Henry’s Fork, Madison, Firehole, South Fork of the Snake, and other local rivers and tributaries.
Many species are multi-brood, meaning a species may produce two or more broods during the calendar year. They are classified as swimmer nymphs. The most important species emerge in the spring and again in the fall. These mayflies produce exceptional dry fly fishing during these periods. Egg laying spinners often crawl under the water to oviposit their eggs.
Pheasant Tail Nymph, Halfback Emerger, CDC Emerger, Paracripple, BWO Soft Hackle, BWO Nohackle, Sparkle Dun, Thorax, and Parachute Adams
18, 20 & 22