Mayfly Genus Ephemera
This genus of large mayflies boasts three species of great importance. Ephemera simulans and Ephemera guttulata, the Brown Drakes and Green Drakes, are both legendary for short-lived periods of blizzard-like hatches. The Yellow Drakes, Ephemera varia, have a slow and steady emergence period, providing consistent low-key action for several midsummer weeks.
Ephemera blanda is a very localized species and unimportant to most anglers. Ephemera compar, sometimes mentioned in older books as a minor Western hatch, is now considered to be extinct.
Several important characteristics vary between the three important species. Read about each one for details.Nymph BiologyMost Ephemera species burrow into rougher substrate than Hexagenia nymphs do. They inhabit sand and fine gravel more frequently than firm silt, although they are found in those environments too.
Pictures of 21 Mayfly Specimens in the Genus Ephemera:
2 Underwater Pictures of Ephemera Mayflies:
Recent Discussions of Ephemera
Green Drake Hatch Temp? 1 Reply »
Last reply on May 24, 2014 by Entoman
HiReplyGD Shuck 10 Replies »
I was looking for a water temperature range for the Green Drake hatch. Anyone know?
Jason's photo of a GD shuck suggests that at hatch time the backs of the nymphs may be a greyish or grey olive color. Possibly useful information, if this is an accurate surmise.ReplyBrown Drake? 20 Replies »
Last reply on Jun 29, 2011 by TNEAL
Came across a mayfly on the Paint River by Crystal Falls, Michigan on June 17th. Is it a brown drake?ReplyEmergence period of green drakes 5 Replies »
Emergence periods for green drakes usually run for 7-10 days in most streams. However, there are streams in the east where emergence periods are prolonged by some of the nymphs being parasitized by Nanocladius and Epoicocladius midge larvae. In these streams, emergence may be prolonged to 21 days. Unparasitized nymphs emerge before parasitized nymphs, with each group showing separate peaks of emergence about a week apart. This is based upon my own research on green drake emergence in streams with these midge species. ReplyGreen Drake Hatch Frustrations 7 Replies »
My question here is this: does anybody know of streams that have this type of prolonged emergence (2-3 weeks) in NY, PA, MD, or WV?
Last reply on Jun 12, 2007 by GONZO
We were fortunate this past weekend to be on Pine Creek during the Green Drake hatch. The spinner fall was incredible. A question I have is why do we miss so many strikes and yet, using the same techniques, the ones we do catch and release practically hook themselves. We were getting strikes on Green Drake Duns and Cripples and Spinners.Reply
One individual described it to us that after observing the trout underwater during a Green Drake hatch, many of the strikes pull a small part of the fly (wing, leg) underwater and they swirl and swallow it there. If that is true, then I can rationalize missing more than 18 fish this weekend. If anyone has observed this please post your observations. Normally we do not have such a great contrast in miss to hookup ratio.
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