Master the nuances of nymph fishing by learning how water movement affects your fly’s behavior. This insightful guide explores how even subtle variations in current speed at different depths can change your presentation—and how to adjust for more effective drifts.

You'll learn how turbulence impacts water temperature and oxygen levels, and how these factors influence aquatic insects like mayflies, stoneflies, and midges. Discover how trout respond—both evolutionarily and day-to-day—to changes in current, and how this knowledge can help you target them more successfully.

• Understanding current speed and how it affects fly movement
• The role of turbulence in water temperature and oxygenation
• Behavior of aquatic insects based on water conditions
• How trout adapt to current and what that means for anglers
• Fishing techniques for drop-offs, midstream obstructions, and sweepers

About the Author:
Jason Randall is a veterinarian certified in fish health and medicine, and a frequent contributor to American Angler. He lives in Woodstock, Illinois.