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.
In mid-January I visited a spot where a heavily spring-fed tributary feeds into a river without much as much spring flow, creating an area of (in the winter) warmer water where hundreds of brookies were stacked up.
The video quality's as lousy as in all my early videos, but it's still amazing to see so many brook trout in such a small spot.