In this first part of our Essential Flies series, we're breaking down the two most fundamental categories: dry flies and nymphs. These patterns form the backbone of most fly fishing strategies, and understanding when and how to fish them will open up new opportunities on nearly every water you encounter.
Dry Flies - a.k.a Bugs on the Water Surface
Dry flies are the most visually rewarding way to fish. There's something magical about watching a trout rise to your fly on the surface. It's the moment that hooks most of us on fly fishing for life. But beyond the thrill, dry flies are practical tools that work when conditions are right.
Fish feed on the surface when insects are hatching or when terrestrial bugs fall into the water. During a good hatch, dry flies can be remarkably effective. The key is matching the hatch, which is using a pattern that resembles the insects on the water and presenting it naturally so it drifts without drag.
Start with these core dry fly patterns:
- Adams - One of the most versatile dry flies ever created. Its gray body and mixed hackle work can imitate countless mayfly species. Fish it whenever you're unsure what's hatching. Here's an Adams with a 'Parachute', a popular, highly visible variant that tends to land naturally
- Elk Hair Caddis - A buoyant, easy-to-see pattern that imitates caddisflies. The elk hair wing sheds water beautifully and makes this fly durable and forgiving. Here's a classic Elk Hair Caddis from Big Y.
- Blue Winged Olives - The Blue Winged Olive (a.k.a. BWO) is a small mayfly pattern that can be incredibly productive when you see small mayflies buzzing around. Here's a nifty deal on 6 size 18 BWO's.
Nymphs - Baby Bugs Under the Surface
Here's a truth: fish spend most of their time eating nymphs underwater, not rising to dry flies on the surface. Nymphs are the larval stage of aquatic insects, and they make up the bulk of a trout's diet.
Nymph fishing requires a different mindset than dry fly fishing. You're fishing blind most of the time, relying on your understanding of where fish hold and how they feed. But when you dial it in, nymph fishing is incredibly productive - often more productive than any other method.
The challenge with nymphs is detecting the take. Unlike a dry fly rise, a nymph strike can be subtle. Many anglers use an indicator (a small float) to help spot takes, while others rely on feel and experience. Both approaches work; it's about finding what suits your style.
Build your nymph box with these essential patterns:
- Pheasant Tail Nymph - A classic that imitates mayfly nymphs across multiple species. Its simplicity and effectiveness have made it a standard for decades. Fish it in sizes 12–18 in most waters. As a staple, I like to keep Pheasant Tails with beads and Flashbacks in my box.
- Hare's Ear Nymph - Another all-purpose pattern with a fuzzy body that moves naturally in the current. The dubbing creates a lifelike appearance that triggers strikes. If you need some for your box, check these out.
- Copper John - A weighted, flashy nymph that sinks quickly and imitates various mayfly nymphs. The copper wire body adds both weight and attraction. If you want to pick some up for your fly box, these size 16 Copper Johns would make a fantastic addition.
- Zebra Midge - A small, thin pattern for selective fish and low-water conditions. Midges are present year-round, making this pattern useful in every season. Don't underestimate the effectiveness of the midge, even if it is the smallest hook you've seen in your life. You can never have too many midges, check out this 6 pack of Size 16 zebras.
- The Frenchie - The Frenchie is an interesting nymph. It doesn't really imitate anything, but the fish don't seem to care. Usually a pheasant tailed nymph with a bead head and pink dubbing for a hot-spot collar, this fly is a great 'searching' nymph that helps you find otherwise uninterested fish in various water conditions. A size 12 or 14 makes a good addition to any fly box.
Matching Conditions and Seasons
The best fly for the moment depends on what's happening in the water. During spring and early summer, mayfly hatches are common, making dry flies and mayfly nymphs your go-to patterns. In late summer and fall fall, terrestrials become important, and nymphs remain reliable year-round.
Water temperature also plays a role. Cold water slows insect activity, so nymphs fished slowly near the bottom often outperform dry flies. Warmer water brings more surface activity and makes dry fly fishing more productive. Fishing mid-day in August probably will only result in a sunburn and frustration.
The time of day matters too. Early morning and evening often bring the best dry fly fishing, while midday can be slow on the surface but productive with nymphs in deeper water.
Building Your Foundation
You don't need hundreds of flies to be successful. You don't need dozens, or even a filled up fly box. Start with a few proven patterns in the sizes and colors that match your local waters. A small box with a dozen dry flies and two dozen nymphs will cover most situations you'll encounter.
As you fish more, you'll develop preferences and discover which patterns work best on your home waters. You'll learn when to reach for a dry fly and when to drop a nymph under an indicator. That knowledge, built through time on the water, is what separates a beginner from a confident angler.
In Part 2 of this series, we'll explore streamers and other specialized patterns that open up new fishing opportunities. For now, focus on mastering these essentials—they'll serve you well on any river.
