The Baetis Rhodani is an important mayfly in my rivers. It hatches throughout the season, often in two generations. The hatch starts in late May, and continues in two generations. The first generation in my rivers is from about 20. May trough June. The second generation hatch typically start in late August and lasts for about three weeks.
The first generation is grey/olive and often light in the tones. The second generation, being considerably smaller, is darker olive.
The Baetis loves bad weather. Often they are hatching in enormous numbers just after a shift in the weather, and most often after a rainfall. Typically the first generation hatch in the afternoon – any time after 1 p.m or often as late at 3 p.m.
This version – the simplified catskill – is not my go-to fly. But when they sit high on the water and need time to dry their wings, I love using this one – either this simplified version or the one with wings. But, the wings are generally not needed for this fly.