Ephemera guttulata: Green Drake

Size: 18 to 30mm
Habitat:

• Current: Slow to Medium Current
• Bottom Substrate: Loamy Substrate, ie, sand, silt, mud, etc.

Behavior:

• E. guttulataspends this stage of it’s life cycle burrowed underneath the stream bed.

Notes:

• While this burrowing nymph isn’t readily available as a food source, wiggle-type imitations often take fish year round.

Imitations:

• Coming Soon!
  

Size: 18 to 30mm
Hatch Dates: See Regional Hatch Charts(coming soon!)
Water Temperature:
Time of Day: All Day
Habitat: Slow to Medium Current
Behavior:

• Guttulata nymphs are powerful swimmers.  They make it to the surface extremely quickly where almost no time passes before the dun bursts from the nymphal shuck.   Usually while collecting for this species, you will only see duns and empty shucks flaoting by- rarely have I found those vulnerable duns who were still in the process of escaping their nymphal shuck.
  

Notes:

• Recently emergent duns are usually more concentrated near the bank, so the wise angler should pay close attention for bank feeders.

Imitations:

• Coming Soon!
  

Size: 18 to 30mm
Time of Day: All Day
Behavior:

• Guttulata duns float for sometimes obscene lengths of time while drying their wings

• Often during this time, they’ll make clumsy attempts at flight.  For this reason, knock-down duns can sometimes be quite effective.

Notes:

• Often, both duns and spinners will be on the water at the same time
  

Imitations:

• Coming Soon!
  

From Side	From Below
Fresh	Spent

Size: 18mm to 30mm
Air Temperature:
Time of Day:

• Spinnerfalls are more concentrated towards and after dusk, however rogue spinners are sometimes on the water in the middle of the day.

Behavior:
Notes:

Imitations:

Coming Soon!

COMING SOON!

On the Web

TroutNut.com’s Green Drake Page:
excellent guttulata photography, natural history info, and fishing tips
Oak Orchard Fly Shop(Western, NY) Hatch Chart:
this page has some excellent guttulata photographs as well as effective flies for each phase
USGS Mayflies of the United States:
shows distribution, but I’m pretty sure their map is incomplete.
Hatches II, Caucci & Nastasi( Google Books):
See pages:
Great Rivers Great Hatches, Meck & Hoover( Google Books):
see pages:
The Dry Fly: New Angles, Lafontaine & Grayum(Google Books):
See Pages:
Nymphs Volume I, Schweibert(Google Books):
See Pages:
Limestone Legends, Shires & Gilford(Google Books):
See Pages:
Highlight: shows a list of Pennsylvania streams with known guttulata activity on page 194.
Jerry Hadden’s Guide Service Upper Delaware River Insects:
shows basic guttulata info as well as pictures of a female spinner and female dun
Fly Anglers Online:
this web article talks a little bit about both Eastern(guttulata) and Western Green Drakes(not guttulata).
Buddy Coin’s:
basic guttulata info and fishing tips

Books and Magazine Articles

Hatches II by Al Caucci and Bob Nastasi
See Pages:
Selective Trout by Doug Siwsher and Carl Richards
See Pages: