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Blue-winged Olives

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.

Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Articles on the Basics

Articles on the Basics

Interpreting Hatch Information

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.

About the Troutnut

Once in a while somebody asks questions about the guy behind this site, so I've provided the answers here.

Understanding the Taxonomic Classification System

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.

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