Interpreting the 4 Feeding Behaviors of Trout

Look at that! Those trout are feeding on duns.”

My buddy Nolan pointed over the starboard bow of our drift boat: “Do you see those fish rising near the bank about forty yards away?”

We were floating the Yellowstone River in Paradise Valley, south of Livingston Montana. It took me a few moments to spot the three trout whose noses kept poking up from the surface. But I didn’t see any tiny mayflies in their dun stage. I thought Nolan was arrogant to make such a claim.

How could he have the 30x vision of a spotting scope?

After I scoffed at him, Nolan explained that he couldn’t see those insects any more than I could. Rather, he made the call by watching how the trout were feeding. While it is not an exact science, you can generally figure out what trout are feeding on by watching their behavior.

1. Noses mean duns

If you see noses poking through the surface, the trout are feeding on mayflies in their dun stage. Sometimes, these trout appear to be standing on their fins, up to their eyeballs in water.

The dun stage is the first of two adult stages of mayflies. A Parachute Adams may work fine. But in some cases — slow, clear water or a specific hatch — it might pay to use a Comparadun or Sparkle Dun pattern. Some kind of cripple pattern may work, too, given that most aquatic insects do not make the transition from nymph to adult stage and remain stuck in the surface film.

2. Fins mean nymphs

If you see only a dorsal fin or tail (and not the trout’s nose), then the trout is feeding on something just below the surface.

This is a good time to use unweighted nymph, which floats just beneath the surface. Or, you can use an emerger pattern which sits low and protrudes into the film beneath it. A pattern which rides high, like a Parachute Adams, will not work well unless it gets water-logged and disappears from your sight.

3. Dimples mean midges or spinners

If you see a small dimple in the water, chances are are the trout are feeding on midges or spent mayfly spinners. You may or may not see the trout’s nose. Sometimes you will even see the trout gently roll through the surface with the grace of a dolphin.

Aside from specific midge patterns, a size #20 Parachute Adams works well for midges. Mayfly spinner patterns have light bodies and wings which lay out to the side (like airplane wings) rather than shooting up from the body at a forty-five degree angle.

4. Splashes mean caddis

If you see rising trout making splashes, they are likely feeding on caddis flies. The reason for the splash is that these flies are fluttering on the surface, and the trout go into attack mode. Some kind of elk hair caddis pattern will do the trick.

Final Thought

Of course, watching surface behavior is only one part of your knowledge base. Knowing which hatches happen in the river you’re fishing at particular times of the year and even specific times of the day is critical to making the correct visual assessment. As always, talk to the experts at your local fly shop or read their reports online. Then keep your eyes open to watch what is happening on the river’s surface.

S2:E31 Nymph Fishing Tactics for Beginners

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Nymph fishing tactics can confound beginner fly fishers. If you’re just starting out, you may ask: How many split shot should I use? How far up should the strike indicator be? Why am I snagging on the bottom all the time? Click on “Nymph Fishing Tactics for Beginners and listen to our episode for beginner fly fishers now.

Listen to our episode “Nymph Fishing Tactics for Beginners”

Great Stuff from Our Listeners. At the end of each episode, we often include a feature called “Great Stuff from Our Listeners.” It’s the last portion of each episode, where Steve reads one of the comments from our listeners or readers. We enjoying hearing from you, and appreciate your advice, wisdom, and fly fishing experience.

If you’re a veteran fly fisher, what tactics would you add to our episode? And if you’re a new fly fisher, what questions do you still have about nymph fishing?

Here are some other podcasts and articles that we’ve publishing on nymph fishing:

    Nymph Fishing’s 7 Nagging Questions

    Our Top Nymph and Wet Fly Patterns

    The Basics of Nymph Fishing

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To see every episode that we’ve published, click on “Every Episode” on the top navigation.

Red Means Stop, Green Means Go – at the River’s Edge

Movies tend to romanticize the fly fishing experience. The natural beauty, the sound of the rushing river, and the rhythmic motion of the cast – all conspire to create an image of tranquility. The entire experience appears to be one speed: slow motion. But when you’re at the river’s edge, it’s not slow motion.

The reality, though, is that there are at least three speeds to fly fishing: go, slow, and stop. In the spirit of the stoplight, green means go, yellow means slow, and red means stop! In this post, I identify nine fly fishing moments that require one or more of these three speeds.

1. Before you step into the river to flyfish – RED

As you approach the river, stop a few yards before the river’s edge. Observe. Even if you’re wading into the river at a public access area, don’t simply traipse into the water and move upstream (or downstream). Wait a few minutes. Do you see any fish rising? Is the stream or river lower? Higher? Do you see any insects in the air or on the water?

Start your fly fishing with a modicum of observation.

2. After you fish for 15 minutes – GREEN

Beginner fly fishers tend to find a decent run and cast in the same spot for hours. Unless you are working a steelhead run in a larger river, most likely you need to move to the next run more quickly than you are.

After ten to fifteen minutes, move to the next run. Truly. Don’t keep flailing the pool or run. Just move on. If there is another fly fisher in the run in front of you, go around him or her – perhaps to a stretch of river that is several runs ahead of him or her. There are exceptions to every rule, but in general, green means go when you are fly fishing in smaller streams and rivers.

3. Approaching your next run – YELLOW

This is a corollary to #1 and #2. Most stretches of rivers do not have unlimited runs – ergo, places where the trout lie. Treat each run like the treasure that it is. Don’t just step into the river and begin slinging.

Slow down to look for rising trout. Check to see if you are casting a shadow over the run you’re trying to fish. Don’t waste the opportunity that is in front of you. Be methodical as you fish. Act as if every run is the last run of the day.

4. Tying knots – YELLOW

It’s tempting to cave in to your excitement (or anxiety) to get back to fly fishing after you have snapped off your fly. Don’t. Slow down and tie a good knot. Make sure you haven’t weakened the monofilament when you tightened the knot.

5. Reeling in fish – GREEN and YELLOW

This requires two speeds. The time you hook the fish to the time you release it is crucial to its survival. Never should you “play” the fish. It’s green all the way. The goal is always to release the fish as fast as you can.

However, if you hook a large fish, you will suddenly realize the impossibility of simply cranking in the fish. You’ll need to slow down to work your drag, pull the fish from side to side to wear it out, and move downstream to a shallow part of the river to net it.

If you want to catch a large brown trout on your three-pound tippet, you’ll need to slow down.

6. Wading – YELLOW

Nothing good comes from trying to move through the river quickly, even in slower moving streams. Speed increases your risk of falling. Slow down to enjoy the experience and to preserve your life.

7. After you see lightning or hear thunder – RED and GREEN

This is patently obvious, but you’ll want to stop (“red”) fly fishing and run (“green”) to find a low spot (not under a tree!). Make sure you leave your fly rod in a safe place but a good many yards away from you. Or your Winston rod may become a lightning rod!

8. When you encounter a bison or moose or grizzly – RED

It’s never a good idea to saunter up to any wild animal or even to run away from a startling encounter. Stop. Maybe even curl up into the fetal position if the wild encounter is a grizzly bear. Hopefully, you have a canister of bear spray around your waist. Some say it works on even on other wild animals.

9. After a great day on the river – GREEN

Green means go to the nearest supper club or rib and chop house. Go with a cold beverage, and go with the largest rib-eye on the menu.

S2:E30 Fly Fishing Expectations for the New Year

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Fly fishing expectations for the new year are in the air (or they should be!). We’re ready to make this next year our best ever, as we seek to find ways to get more days on the water. We’re not professional fly fishers or guides, so our days fly fishing will not be legion (we have day jobs), but we hope to claw and scratch for as many fly fishing days as we can. Click now to listen to our episode on fly fishing expectations for the new year.

Listen to our episode “Fly Fishing Expectations for the New Year”

Great Stuff from Our Listeners. At the end of each episode, we often include a feature called “Great Stuff from Our Listeners.” We read a few of the comments from this blog or from our Facebook page. We enjoying hearing from our readers and listeners, and appreciate your advice, wisdom, and fly fishing experience.

Any plans for the new year? Do you hope to get more days on the water? Any plans for a bigger fly fishing trip? Any books you plan to read or skills you hope to acquire? Please post your comments below!

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My 3 Most Humbling Fly Fishing Moments

Humility is not something I necessarily seek out. But this past year, I had three moments while fly fishing that put me in my place. I don’t fancy myself an expert. Far from it. But I have fly fished for a lot of years. Doesn’t that count for something? Apparently not.

Here are my three most humbling moments while fly fishing this past year.

1. Nymph fishing with a guide in Yellowstone National Park

This past year, we (Steve, my podcast partner, and I) hired a guide for a half day. We needed some intel on the Gardner River. We didn’t want to waste an entire day exploring the two- or three-mile stretch of river that we had planned to fish.

The guide (as most are) was terrific. Young. Energetic. Specific in his instructions. And dead right.

About mid morning, we hit the trail, moving from a spectacular run to another upriver. While on the trail, he said, “Let’s stop and hit this little run for a few minutes.” The run was against the far side of the bank and flowed towards us at a quirky angle. I had to cast my two-nymph rig from left to right, almost an over-the-shoulder toss. And to hit the hot zone required a modicum of precision.

I tried six or seven times. Nope. Couldn’t make the cast. I even moved closer to the run, almost on top of the spawning browns. It wasn’t more than a 15-foot cast. Not even close. The one time I hit the general vicinity of the hot zone, I couldn’t get a decent dead drift to save my life.

Finally, in disgust, the guide said, “Let’s just move on.” I felt the sting of his non-verbal rebuke the rest of the day.

2.Mentoring a newbie fly fisher at 12,000 feet

I took a friend on a long day hike into the Colorado’s Collegiate Wilderness. We hiked four miles into the lake, the last mile a lung-bursting climb.

This was his first time fly fishing. I had coached him in buying his first rod, reel, and the rest of the paraphernalia. As soon as we arrived at the high mountain lake, just several hundred yards from the Continental Divide, I began setting up his rod and reel. I tried out his new rig first, made a cast or two, and immediately caught a rising cutthroat.

I handed him the rod, made a few suggestions, and within minutes he had caught a nice cutthroat. And then another. And another.

He was one of those natural athletes. I saw no difference between how far out I was able to cast (and I had just purchased a new Sage rod!) and how far he was able to cast. At the end of the day, we caught about the same number of cutts. I was reminded that for some, fly fishing isn’t all that challenging. At least not for him. On his first day. I truly felt excited for him.

I had, though, a simultaneous emotion – a touch of grumpiness. I wanted to warn him that fly fishing can only go downhill from here, that this kind of day was an aberration. But I didn’t. I swallowed my sense of importance as the veteran fly fisher and cheered him on.

3. Hiking (er, sliding) down an avalanche chute

It was stupid when I was 34. And irresponsible at 54 years old.

On the way back from the high mountain lake mentioned in the previous point, I called an audible that could have been a disaster. I remembered that there was shortcut down the mountain, an old avalanche chute now overgrown with brush and young (25-year-old) pine trees.

I had taken the shortcut twenty years earlier and forgot (or had suppressed) how steep it was.

As soon as we began to wind down the chute, sliding a few steps and then stopping, often by grabbing small trees, I felt the fear that registers deep in your soul. I snaked my way down slowly and deliberately, occasionally glancing over my shoulder to make sure my friend was making progress. About an hour later, emotionally and physically exhausted, we arrived at the bottom of the chute. We still had another couple hours of hiking left before we reached our truck.

Nothing is more humbling than stupidity in midlife. Maybe the male brain never fully matures.

S2: E29 This Past Year’s Fly Fishing Lessons

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Fly fishing lessons do not necessarily involve expense. They’re all about learning, growth, and becoming better at the sport. In this episode, we look back on 2016 and discuss what we learned most from our days on the water. Click now to listen to “This Past Year’s Fly Fishing Lessons” in your browser.

Listen to our episode “This Past Year’s Fly Fishing Lessons”

Great Stuff from Our Listeners. At the end of each episode, we often include a feature called “Great Stuff from Our Listeners.” We read a few of the comments from this blog or from our Facebook page. We enjoying hearing from our readers and listeners, and appreciate your advice, wisdom, and fly fishing experience.

What fly fishing lessons did you learn (or relearn) this past year? What made the year great (or a challenge)?

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That helps fellow fly fishers decide whether the podcast is a good fit for them.

Winter Fly Fishing without Losing It

Winter fly flshing is not my favorite. But there is a mystique to fishing the big rivers of Montana or the spring creeks in Minnesota a few days before Christmas or a couple weeks into the new year.

If you fly fish in winter, be careful to do so without losing it. I’m using the pronoun “it” to refer to everything from your sanity to the feeling in your fingers to life itself. The frustration and the dangers intensify in the winter.

Here are seven strategies for keeping your sanity and your life intact:

1. Lower your expectations

Don’t expect a twenty-fish day. Trout feed, but not as aggressively as they will when winter gives way to spring. Don’t expect that your hands will stay warm. Don’t expect the guides on your fly rod to remain ice-free.

2. Wait for mid-day and early afternoon

Trout respond better in these brief periods of warmth. You may, too. So sleep in and quit early. While we’re on the topic of warmth, wait for a warmer day. Tie flies or read a fly fishing book when the weather is in the teens.

3. Focus on shallow water, not deep pools

Bud Lilly, one of the deans of western fly fishing, assumes the fish in deep pools are not feeding as actively as fish in shallow riffles. Deep pools do not get enough sunlight, while the sun can trigger insect activity or even the metabolism of a sluggish trout in a shallow riffle.

4. Try nymphs first

I’ve had some good midge fishing in January on Montana’s Madison River. But unless you get into rising fish, nymphs may be your best bet. Trout do not chase streamers as aggressively (if they chase them at all) as they will when the water temperatures get warmer.

5. Avoid wading in deep water

Slipping and falling into the river on a thirty degree day is much different than on an eighty degree day in July. In July, a bath might cost you your dignity. In January, it might cost you your life.

6. Go with a buddy

This is always the safest approach to fly fishing, but it’s even more critical in the winter. A sprained knee a quarter mile from your vehicle could be a disaster in cold temperatures if you are alone.

7. Dress for warmth

It goes without saying, but pile on those layers. Put on waterproof gloves. Cover your face with a neck gator or a face mask. Double up on socks, too. Wear a wool or fur or polyester fleece hat. The folks at Harvard Medical School say that without a hat you can lose up to fifty percent of your body heat in certain cold-weather conditions even if the rest of your body is bundled up.

Final Thought

Alright, I promised seven strategies, so I won’t add an eighth one about bringing a thermos of hot chocolate or coffee. Also, the jury is out on whether you want clouds or sun. A friend and veteran fly fisher in Montana used to say, “The worst day for fly fishing is a sunny day in February.” My experience suggests he is right. Yet, as noted earlier, Bud Lilly observes that sunlight can trigger certain insect hatches, particularly the big “snowflies” that appear on many big rivers beginning in February.

For now, I’d suggest worrying less about the presence or absence of cloud cover than whether or not you remembered to bring that thermos filled with warm liquid.

S2:E28 One Fine Day on Willow Creek

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Willow Creek is a gorgeous tailwater stream that flows out of Harrison Reservoir about an hour west of Bozeman, Montana. The willow-thick creek makes its way to the Jefferson River, which eventually flows in the Missouri. This fall, we spent a day fishing streamers on Willow Creek, and it became one of several highlights of our fly fishing year. Click on One Fine Day on Willow Creek now to listen to the podcast in your browser.

Listen to our episode “One Fine Day on Willow Creek”

Great Stuff from Our Listeners. At the end of each episode, we often include a feature called “Great Stuff from Our Listeners.” We read a few of the comments from this blog or from our Facebook page. We enjoying hearing from our readers and listeners, and appreciate your advice, wisdom, and fly fishing experience.

Describe a recent fine day on the water? What make it a terrific day? What made the experience more than simply a day of catching lots of fish?

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Witty Fly Fishing Sayings for the Ages

Proverbs are little sayings that condense a volume of insight into a pithy sentence. A few years ago, I picked up a book of Haitian proverbs in a bookstore in Port-au-Prince. One of my favorites is: “Pretty teeth are not the heart.” I am also fond of Savvy Sayin’s, a little book of proverbs from the old west. One of the gems it contains is: “Never approach a bull from the front, a horse from the rear, or a fool from any direction.”

I’m a big fan of proverbs and aphorisms. By far, my favorite collection is in the Book of Proverbs (in the Bible). One of its well-known aphorisms is: “A gentle answer turns away wrath, but a harsh word stirs up anger” (15.1) Another blunt-but-true proverb is “If you find honey, eat just enough – too much of it, and you will vomit” (25:16).

Fishing One Liners for the Ages

So far, I haven’t found a book of fly fishing proverbs. But I’ve discovered some great one-liners as I’ve read fly fishing books and listened to wise fly fishers. Here are some of my favorites. These sayings drip with wisdom. They challenge me, stop me in my tracks, and make me think. You might find a few of these useful, too:

    You don’t learn fly fishing as much as you survive it. [Tom Davis]

    There are lots of ways to catch a trout. Maybe that’s why there are so many experts. [Bud Lilly]

    There’s no taking trout with dry breeches. [Miguel de Cervantes, about 400 years ago]

    The more you fly fish, the less flies you will use. [Bob Granger]

    Rivers and their inhabitants are made for the wise to contemplate and for fools to pass by without consideration. [Izaak Walton]

    The deepest satisfaction comes from letting go. [Tom Davis, on catch-and-release fishing]

    There is no greater fan of fly fishing than the worm. [Patrick McManus]

    Creeps and idiots cannot conceal themselves for long on a fishing trip. [John Gierach]

    No hatch is good enough for you to risk waving a nine-foot graphite rod around during a lightning storm. [Bud Lilly]

    There’s a fine line between fly fishing and waving your rod like an idiot. [adapted from a proverb by Steven Wright]

    Accepting advice makes you no less a fisherman. [Peter Kaminsky]

    What a tourist terms a plague of insects, the fly fisher calls a great hatch. [Patrick McManus]

    Many go fishing all their lives without knowing that it is not fish they are after. [Henry David Thoreau]

These pearls are words to live by as well as to fish by. Here’s one last fly fishing proverb:

    Blessed is the fly fisher who has nothing to say and doesn’t say it.

S2:E27 The Myths and Truths of Catching Big Fish

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Catching big fish is no doubt a signal of skill. Then again, it may not be. A 10-year-old on a guided fly fishing trip can hook and crank in the largest rainbow that the guide has ever seen on that stretch of river. That’s not really skill. Or maybe it is: It’s the skill of the guide, not the young fly fisher. Click now to listen to our episode on “The Myths and Truths of Catching Big Fish.”

Listen to our episode “The Myths and Truths of Catching Big Fish”

Great Stuff from Our Listeners. At the end of each episode, we often include a feature called “Great Stuff from Our Listeners.” We read a few of the comments from this blog or from our Facebook page. We enjoying hearing from our readers and listeners, and appreciate your advice, wisdom, and fly fishing experience.

What is the biggest fish you’ve caught? Did you “hunt” the fish? What did you catch it on? A streamer, dry fly, nymph?

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View some of our most recent podcast episodes on iTunes or on Stitcher, if you have an Android.

Rate the 2 Guys Podcast

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That helps fellow fly fishers decide whether the podcast is a good fit for them.