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Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large Brown Trout that only touch streamers for the rest of the year.

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 (Phylums, Genera, and All That)

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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