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.
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.