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.
Preferred waters: Lakes and rivers, warm and cool. Alkaline waters produce the best hatches.
Time of day: Dusk
Current speed: Slow to medium
Substrate: Silt or clay
Environmental tolerance: High tolerance for temperatures warmer than trout can stand; low tolerance for pollution