George Altemus alerts us to a video that is available via the Midcurrent Fly Fishing site. George says: “This is the best underwater photography I’ve ever seen showing the habitat of the four types of mayfly nymphs: the clingers, crawlers, burrowers, & swimmers.” The video was shot in a very healthy stream in the mountains of California. Preserving and enhancing such cold water resources is part of the mission of TU. Click here for the Midcurrent video.