Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
The initial spinner flights of these species may occur at midday. As the weather climbs into the 80's and 90's, they will progressively fall later until they occur at dusk. In August, the spinner flight may take place during mid-morning...
Daytime spinner flights are very sparse for such a common species because the large spinners do not become active until well after nightfall, and ovipositing is accomplished at 4am.
Current speed: Medium to fast