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