Green drake
Also called Green Drake, Green drake hatch, Green drakes
A “green drake” is a large mayfly hatch that can bring trout to the surface for big dry flies, especially in late spring and early summer. The name is used for several similar-looking mayfly species depending on the region.
- Group
- Mayfly hatches
- Category
- Entomology & forage
- Level
- Intermediate
- Water
- Freshwater
Last updated
What Green drake means
Big mayflies get called “drakes” in fly fishing, and “green drake” is the common name anglers use for a group of large, green-bodied mayflies. In many Western trout fisheries it refers to Drunella species; in other places it may be used more loosely for any large, green mayfly.
When anglers talk about “the green drake hatch,” they usually mean the main emergence of duns, followed by an evening spinner fall. Because the insects are large, trout can key on them hard and feed confidently in softer seams, edges, and foam lines.
Imitations are typically larger dry flies and emergers in green/olive tones, plus a matching spinner pattern when the fall happens. Exact size, shade, and timing vary by river, elevation, and year.
Why it matters on the water
Green drakes are one of the times when fly size matters more than micro-detail. If fish are eating drakes and a fly looks “small,” it often gets ignored even if the drift is clean.
The hatch can be short and localized. Knowing the term helps narrow the plan: look for the right water type (slower edges and defined lanes), watch for duns first, then be ready to switch to a spinner pattern when rises turn steady and rhythmic.
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Read next
- HexageniaHexagenia are large burrowing mayflies (the “hex” hatch). Their nymphs live in soft-bottom lakes and slow rivers, and the adults can bring big trout up to feed after dark.
- March brown“March brown” is a common name for several medium-to-large spring mayflies and the hatch events tied to them. The name can mean different species depending on region.
- Pale morning dunA “Pale Morning Dun” (PMD) is a common mayfly hatch made up of small, pale yellow mayflies. Anglers use PMD nymph, emerger, dun, and spinner patterns to match it.
- SpinnerA spinner is a dry fly that imitates an adult mayfly after it has mated and fallen spent on the water, usually with wings laid flat to the sides.