Hatches › Mayfly

Mayfly

Hecuba

Timpanoga hecuba · species

A large red-brown mayfly that gives anglers a classic Red Quill match from nymph to spinner.

Overview

About Hecuba

Timpanoga hecuba is a mayfly in the family Ephemerellidae, commonly known as the Great Red Quill. For anglers, it matters most as a larger red-toned mayfly whose nymphs, emergers, duns, and spent spinners can all draw fish during a hatch.

Also known as: Red Quill

Life Cycle

Eggs

Female mayflies deposit hundreds to thousands of eggs either in or near the water. These eggs then sink to the stream bottom to begin the next generation.

Nymph

Mayfly nymphs spend most of their lives on the stream bed, where they feed and grow. They undergo multiple molts as they mature underwater.

Emerger

When ready, the nymph rises to the water's surface, where it transforms into a subimago, or emerger, and begins to hatch.

Dun / Adult

This freshly emerged adult, known as a dun, rests on or just above the water's surface. It will soon fly off to complete its final molt.

Spinner

After mating, adult mayflies, now called spinners, ascend into the air. They are now ready for the final act of reproduction.

Egg Laying Spinner

The female spinner returns to the water's surface to deposit her eggs, ensuring the continuation of the species.

Spent Spinner

Having completed their reproductive purpose, adults die shortly after laying eggs. They are often found floating lifelessly on the water's surface.

Stages: Aquatic nymphs develop underwater, then emerge through an emerger stage into upright-winged duns before molting again into spinners. Anglers commonly fish all four stages: nymph, emerger, dun, and spinner.
Emergence cues: Look for activity in the broader spring-to-early-summer window when flows and temperatures stabilize, with hatches often building during the warmer part of the day and spinner falls tending toward calmer low-light periods.
Behavior: Nymphs stay associated with the stream bottom until emergence. As they hatch, insects pause in or just under the surface film before floating off as duns; later, spent spinners fall flush in the surface film and can create focused feeding.

How to Tie Hecuba Patterns

Dun / Adult

From Higa’s SOS to Cheech’s SUS - The “Suspiciously” Effective Dry Fly!

Fly Fish Food

Materials

Hook#16Fulling Mill 5065 Czech Nymph, Barbless
Hook (Alternate)#16Fulling Mill 1130 - Light Weight Grub Hook - Bronze
ThreadPro Thread Flat 70 Den - Black
Thread (Alternate)UTC Ultrathread 70 Denier - Black
India Hen BackIndia Hen Back - Black # 11
Ringneck Pheasant Tail (Alternate)Ringneck Pheasant Tail - Black
WireUTC Ultra Wire - Small - Silver
Wire (Alternate)UNI-Soft Wire - Small - Neon Silver
DubbingFulling Mill Ultra Dry Dub - Onyx
Dubbing (Alternate)Fulling Mill Tactical Dry Fly Dub - Black
HackleMetz - Select Single Pack - Grizzly - 16
Flex MaterialFulling Mill Flex-Floss - Red
Flex Material (Alternate)Life-Flex Spandex Material - Red

Spent Spinner

Tying a Hecuba Cripple

Brent Jones Fly Tying

Materials

Hooksize 10
Thread8/0Uni, yellow
EP fiberFor shock and rib
Dubbing BlendCustom blended, golden yellow
Deer HairFor front wing
Hackle3-4 turns
Glue

Where It Hatches

Hecuba

One species, multiple rivers.

River

North Fork Big Wood River

Fly Patterns

Hecuba Dry#10-12

Angler Notes

Why it matters: This is a high-value match-the-hatch bug because trout may key on it at several points in the hatch, especially when larger mayflies are scarce and more noticeable.
Imitation tips: Carry slim but slightly robust mayfly nymphs in red-brown or mahogany tones, soft-hackle or film-style emergers, upright-wing duns, and rusty spinner patterns. Keep body color warmer and redder than a generic brown mayfly when fish are selective.
Key life stages: nymphemergerdunspinner
Presentation: Start with a dead-drifted nymph before surface activity begins, then switch quickly to emergers or duns once you see rises. When fish sip gently in flat water, a low-riding spinner or cripple-style presentation is often the most precise finish.

Identification

Key features: A robust mayfly with the typical upright-winged dun and flat-winged spinner stages; anglers key on its larger profile and red-quill look compared with smaller mayflies.
Size: Generally a medium-large mayfly by trout-fly standards; commonly imitated around hook sizes 10-14.
Coloration: Usually matched with reddish-brown to mahogany bodies, darker thorax, and gray to smoky wings on duns; spinners are often tied with rusty-red bodies and clearer wings.
Similar bugs: March BrownMahogany DunRed QuillGray Fox

Habitat

Water types: riversstreamsrifflesruns
Substrate: Rocky to cobble stream bottoms with enough current to keep water moving and oxygenated.
Conditions: Best associated with clean, cool, well-oxygenated flowing water.

Eaten By

Brook Trout

Rainbow Trout

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Hecuba

Overview

About Hecuba

Life Cycle

Eggs

Nymph

Emerger

Dun / Adult

Spinner

Egg Laying Spinner

Spent Spinner

How to Tie Hecuba Patterns

From Higa’s SOS to Cheech’s SUS - The “Suspiciously” Effective Dry Fly!

Tying a Hecuba Cripple

Where It Hatches

Fly Patterns

Angler Notes

Identification

Habitat

Eaten By