Insect Hatch Guide

Quickly read the insect families that power our hatch charts, know which flies match each stage, and see how that data feeds the FlyGuysNLies recommendation engine.

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Insect hatch directory

Each card links to the insect profile that feeds our hatch charts and fly matches.


 Ant hatch illustration

Ant

Complete guide to Ant fly fishing patterns. Learn when and how to fish Ant imitations for trout during terrestrial hatches. Includes hatch timing, pattern re...

View Ant hatch guide

 Aquatic Worm hatch illustration

Aquatic Worm

Complete guide to Aquatic Worm fly fishing. Learn Aquatic Worm hatches, life cycles, and the best fly patterns for matching this important trout food source.

View Aquatic Worm hatch guide

 Attractor Streamer hatch illustration

Attractor Streamer

Master Attractor Streamer fly fishing patterns and techniques. Learn best imitations, presentation methods, and when to use Attractor Streamer patterns for t...

View Attractor Streamer hatch guide

 Beetle hatch illustration

Beetle

Complete guide to Beetle fly fishing patterns. Learn when and how to fish Beetle imitations for trout during terrestrial hatches. Includes hatch timing, patt...

View Beetle hatch guide

 Black Caddis hatch illustration

Black Caddis

Black Caddis emerge in massive spring hatches around Mother's Day. Learn pupa swing tactics, afternoon timing, and the best small dark fly patterns.

View Black Caddis hatch guide

 Blue Wing Olive hatch illustration

Blue Wing Olive

BWOs hatch heaviest on the nastiest days — rain, snow, cold. Learn why emergers outfish dries, the right sizes by season, and spinner fall tactics.

View Blue Wing Olive hatch guide

 Brown Drake hatch illustration

Brown Drake

Brown Drakes bring spinner falls so thick the water boils at dusk. Learn to target sandy-bottom burrower habitat and fish the evening chaos.

View Brown Drake hatch guide

 Brown Trout Eggs hatch illustration

Brown Trout Eggs

Brown trout eggs are a top fall food source. Learn orange egg patterns, dead-drift rigging below redds, and ethical tactics during Oct-Dec spawn season.

View Brown Trout Eggs hatch guide

 Caddis hatch illustration

Caddis

Complete guide to Caddisflies (Trichoptera) fly fishing. Learn Caddisflies (Trichoptera) hatches, life cycles, and the best fly patterns for matching this im...

View Caddis hatch guide

 Callibaetis hatch illustration

Callibaetis

Western lakes' #1 mayfly hatch runs May–Sept. Time multi-brood emergences, fish wind lanes, and match dries to cruising trout — FlyGuys has live hatch charts.

View Callibaetis hatch guide

 Chironomid hatch illustration

Chironomid

Lake trout eat chironomid pupae 80-90% of the time. Master indicator depth, the static retrieve, and bomber-sized patterns that produce trophy fish.

View Chironomid hatch guide

 Cicada hatch illustration

Cicada

Complete guide to Cicada fly fishing patterns. Learn when and how to fish Cicada imitations for trout during terrestrial hatches. Includes hatch timing, patt...

View Cicada hatch guide

 Cluster Midge hatch illustration

Cluster Midge

Complete guide to Cluster Midge fly fishing. Learn Cluster Midge hatches, life cycles, and the best fly patterns for matching this important trout food source.

View Cluster Midge hatch guide

 Crayfish hatch illustration

Crayfish

Master Crayfish fly fishing patterns and techniques. Learn best imitations, presentation methods, and when to use Crayfish patterns for trout. Includes hatch...

View Crayfish hatch guide

 Cricket hatch illustration

Cricket

Complete guide to Cricket fly fishing. Learn Cricket hatches, life cycles, and the best fly patterns for matching this important trout food source. Includes ...

View Cricket hatch guide

 Damselfly hatch illustration

Damselfly

Complete guide to Damselfly fly fishing. Learn Damselfly hatches, life cycles, and the best fly patterns for matching this important trout food source.

View Damselfly hatch guide

 Dragonfly hatch illustration

Dragonfly

Complete guide to Dragonfly fly fishing. Learn Dragonfly hatches, life cycles, and the best fly patterns for matching this important trout food source.

View Dragonfly hatch guide

 Flavs hatch illustration

Flavs

Flavs hatch during spring runoff when trout are hungry. Learn emergence timing, the best clinger nymph rigs, and dry fly patterns for sizes 10-14.

View Flavs hatch guide

 Golden Stone hatch illustration

Golden Stone

Golden stones hatch for weeks after salmonflies end. Learn why Pat's Rubber Legs is the #1 Western nymph and how to fish big dries into…

View Golden Stone hatch guide

 Grasshopper hatch illustration

Grasshopper

When August wind blows hoppers onto the water, big trout go ballistic. Learn splat casts, bank-hugging drifts, and the best foam hopper patterns.

View Grasshopper hatch guide

 Gray Drake hatch illustration

Gray Drake

Complete guide to Gray Drake fly fishing. Learn Gray Drake hatches, life cycles, and the best fly patterns for matching this important trout food source.

View Gray Drake hatch guide

 Green Drake hatch illustration

Green Drake

Green Drakes are the largest Western mayflies — big enough to bring 20-inch fish to the surface. Learn to time this short, intense summer hatch.

View Green Drake hatch guide

 Green Sedge hatch illustration

Green Sedge

Learn about the Green Sedge (Rhyacophila), a free-living caddisfly vital for trout in freestone rivers. Discover larva patterns, hatch timing, and fishing tips.

View Green Sedge hatch guide

 Hexagenia hatch illustration

Hexagenia

Complete guide to Hexagenia fly fishing. Learn Hexagenia hatches, life cycles, and the best fly patterns for matching this important trout food source.

View Hexagenia hatch guide

 Juvenile Trout hatch illustration

Juvenile Trout

Complete guide to Juvenile Trout fly fishing. Learn Juvenile Trout hatches, life cycles, and the best fly patterns for matching this important trout food sou...

View Juvenile Trout hatch guide

 Leech hatch illustration

Leech

Master Leech fly fishing patterns and techniques. Learn best imitations, presentation methods, and when to use Leech patterns for trout. Includes hatch timin...

View Leech hatch guide

 Little Black Stonefly hatch illustration

Little Black Stonefly

Complete guide to Little Black Stonefly fly fishing. Learn Little Black Stonefly hatches, life cycles, and the best fly patterns for matching this important ...

View Little Black Stonefly hatch guide

 Little Yellow Stonefly hatch illustration

Little Yellow Stonefly

Complete guide to Little Yellow Stonefly fly fishing. Learn Little Yellow Stonefly hatches, life cycles, and the best fly patterns for matching this importan...

View Little Yellow Stonefly hatch guide

 Mahogany Dun hatch illustration

Mahogany Dun

Mahogany Duns hatch on the dreariest fall days when nothing else is moving. Learn to match these slim #16-18 mayflies and double up with BWOs.

View Mahogany Dun hatch guide

 March Brown hatch illustration

March Brown

Complete guide to March Brown fly fishing. Learn March Brown hatches, life cycles, and the best fly patterns for matching this important trout food source.

View March Brown hatch guide

 Mayfly hatch illustration

Mayfly

Complete guide to Mayfly (Ephemeroptera) fly fishing. Learn Mayfly (Ephemeroptera) hatches, life cycles, and the best fly patterns for matching this importan...

View Mayfly hatch guide

 Midge hatch illustration

Midge

Complete guide to Midge fly fishing. Learn Midge hatches, life cycles, and the best fly patterns for matching this important trout food source. Includes hatc...

View Midge hatch guide

 Midnight Stone hatch illustration

Midnight Stone

Complete guide to Midnight Stone fly fishing. Learn about the nocturnal Claassenia sabulosa, its life cycle, and the best large nymph patterns to target trophy…

View Midnight Stone hatch guide

 Minnow hatch illustration

Minnow

Master Minnow fly fishing patterns and techniques. Learn best imitations, presentation methods, and when to use Minnow patterns for trout. Includes hatch tim...

View Minnow hatch guide

 Mother's Day Caddis hatch illustration

Mother's Day Caddis

Complete guide to Mother's Day Caddis fly fishing. Learn Mother's Day Caddis hatches, life cycles, and the best fly patterns for matching this important trou...

View Mother's Day Caddis hatch guide

 Mountain Whitefish Eggs hatch illustration

Mountain Whitefish Eggs

Whitefish eggs are cream to pale yellow (not orange). Spawning Oct-Dec floods tailwaters with protein trout devour. ID guide + egg pattern tips.

View Mountain Whitefish Eggs hatch guide

 Mysis hatch illustration

Mysis

Mysis shrimp create football-shaped trout on the Frying Pan, Blue, and Taylor. Learn transparent fly patterns, sight-fishing tactics, and depth tricks.

View Mysis hatch guide

 October Caddis hatch illustration

October Caddis

October Caddis egg-laying creates fall's best dry fly fishing. Learn when females dive underwater, how trout respond, and the patterns that trigger explosive strikes.

View October Caddis hatch guide

 Other Aquatic hatch illustration

Other Aquatic

Complete guide to Other Aquatic fly fishing. Learn Other Aquatic hatches, life cycles, and the best fly patterns for matching this important trout food source.

View Other Aquatic hatch guide

 Pale Evening Dun hatch illustration

Pale Evening Dun

Complete guide to Pale Evening Dun fly fishing. Learn Pale Evening Dun hatches, life cycles, and the best fly patterns for matching this important trout…

View Pale Evening Dun hatch guide

 Pale Morning Dun hatch illustration

Pale Morning Dun

PMDs define Western summer dry fly fishing. Learn why cripple patterns outperform dries, the morning emergence window, and spinner tactics.

View Pale Morning Dun hatch guide

 Rainbow Trout Eggs hatch illustration

Rainbow Trout Eggs

Rainbow trout eggs range from pale orange to bright red. See real egg photos, spawning timing (spring), and why egg patterns work after the hatch.

View Rainbow Trout Eggs hatch guide

 Red Quill hatch illustration

Red Quill

Match the Red Quill hatch with timing cues, proven fly patterns, and presentation tips for better trout fishing.

View Red Quill hatch guide

 Saddle Case Caddis hatch illustration

Saddle Case Caddis

Complete guide to Saddle Case Caddis fly fishing. Learn Saddle Case Caddis hatches, life cycles, and the best fly patterns for matching this important trout…

View Saddle Case Caddis hatch guide

 Salmonfly hatch illustration

Salmonfly

3-inch salmonflies trigger the wildest dry fly fishing of the year. Learn to track the traveling hatch, fish tight to banks, and why the splat…

View Salmonfly hatch guide

 Scud hatch illustration

Scud

Orange scud fly pattern for tailwaters. Scud aquatic insect identification, colors, sizes 14-18. Dead shrimp patterns for trout.

View Scud hatch guide

 Sculpin hatch illustration

Sculpin

Master Sculpin fly fishing patterns and techniques. Learn best imitations, presentation methods, and when to use Sculpin patterns for trout. Includes hatch t...

View Sculpin hatch guide

 Skwala hatch illustration

Skwala

Skwalas are the first big bug of spring — hatching before runoff when trout are starving. Learn the egg-laying skitter and pre-runoff timing.

View Skwala hatch guide

 Sowbug hatch illustration

Sowbug

Sowbugs carpet tailwater bottoms by the thousands. Learn dead-drift tactics, the Ray Charles pattern, and why this flat crustacean outfishes scuds.

View Sowbug hatch guide

 Spotted Sedge hatch illustration

Spotted Sedge

Complete guide to Spotted Sedge fly fishing. Learn Spotted Sedge hatches, life cycles, and the best fly patterns for matching this important trout food source.

View Spotted Sedge hatch guide

 Spruce Moth hatch illustration

Spruce Moth

Complete guide to Spruce Moth fly fishing. Learn Spruce Moth hatches, life cycles, and the best fly patterns for matching this important trout food source.

View Spruce Moth hatch guide

 Stonefly hatch illustration

Stonefly

Complete guide to Stonefly (Plecoptera) fly fishing. Learn Stonefly (Plecoptera) hatches, life cycles, and the best fly patterns for matching this important ...

View Stonefly hatch guide

 Streamer hatch illustration

Streamer

The complete guide to streamer fishing for trout. Master big fish tactics, best patterns like Woolly Buggers, and techniques for catching predatory brown trout.

View Streamer hatch guide

 Sulfur hatch illustration

Sulfur

Complete guide to Sulfur fly fishing. Learn Sulfur hatches, life cycles, and the best fly patterns for matching this important trout food source. Includes ha...

View Sulfur hatch guide

 Terrestrial hatch illustration

Terrestrial

Complete guide to Terrestrial Insects fly fishing patterns. Learn when and how to fish Terrestrial Insects imitations for trout during terrestrial hatches.

View Terrestrial hatch guide

 Traveling Sedge hatch illustration

Traveling Sedge

Complete guide to Traveling Sedge fly fishing. Learn Traveling Sedge hatches, life cycles, and the best fly patterns for matching this important trout food s...

View Traveling Sedge hatch guide

 Trico hatch illustration

Trico

Tricos hatch in clouds so thick they look like smoke. Master the early morning spinner fall, cluster patterns, and the micro-drag-free drift.

View Trico hatch guide

 Yellow Sally hatch illustration

Yellow Sally

Complete guide to Yellow Sally fly fishing. Learn Yellow Sally hatches, life cycles, and the best fly patterns for matching this important trout food source.

View Yellow Sally hatch guide