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.
In 6 records from GBIF, adults of this species have been collected during June (67%) and July (33%).
To determine whether a specimen of Agnetina belongs to Agnetina flavescens, use the Key to Species of Agnetina Nymphs or Key to Species of Agnetina Adults.