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.
Some important background information will help readers get the most out of information about fly hatches on this website or in any angling entomology book. Aquatic insects are complicated and unpredictable, and emergence dates, times, and habits often deviate from the "typical" behavior. Learn how to predict and understand the most common deviations.
Once in a while somebody asks questions about the guy behind this site, so I've provided the answers here.
Learn the handy system by which biologists arrange all living things. The Aquatic Insects section of this site will be easier to navigate, and make more sense, for readers who understand the basics of the taxonomic system.