Troutnut.com Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

> > Small Sulphurs

The Specimen

The Discussion

GONZOOctober 28th, 2008, 3:52 pm
Site Editor
"Bear Swamp," PA

Posts: 1681
It's been my suspicion for quite some time that a good part of the credit given to dorothea for creating the later, lighter-colored "little sulphur" hatch should probably go to the same species (or species complex) that creates the earlier, larger, darker hatch--E. invaria. Many anglers who fish the small suphurs on valley limestone streams in my home state believe (or have been led to believe) that they are fishing the dorothea hatch. Close inspection of the mayfly that causes the activity usually doesn't bear that out. Most of the true dorothea hatches seem to come from mountainous areas where the streams are faster and have rockier bottoms.

All of the specimens in this section are from PA, and this seems to provide a good case in point. This specimen and the nymph (#766) are good examples of dorothea, and they both came from sections of the Brodheads in the Poconos. The other specimens came from big limestoners and appear to be invaria. Notice that all of the dun and spinner specimens, except for this one, have banded tails (dark markings at the segments). As far as I know, this is not characteristic of the Eastern version of dorothea (E. dorothea dorothea), but it is a trait of invaria.
TroutnutOctober 29th, 2008, 4:01 pm
Administrator
Bellevue, WA

Posts: 2544
Thanks. That makes a lot of sense.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
TightLineJuly 22nd, 2014, 9:39 am
Missouri

Posts: 1
We have these little guys in our spring creeks here in Missouri. They are usually about a size 24. Duns are White/opaque in color with the big orange eyes. The hatch is in the evening from May to October with the prime months June to September. A challenging fly to fish with precise presentations necessary.
McCloud Redband
EntomanJuly 22nd, 2014, 7:28 pm
Northern CA & ID

Posts: 2604
Welcome to the forum, Tightline.

While anything is possible, your tiny flies are probably in one of the baetid genera of Little Sulfur Quills. True PMD's are much larger (14 to 18). If you look closely, you may notice they only have two tails and are either lacking hind wings or they are virtually impossible to make out with eyes older than 35. ;)
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman

Quick Reply

You have to be logged in to post on the forum. It's this easy:
Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.

Related Discussions

TitleRepliesLast Reply
Re: Little J
In General Discussion by Wbranch
3May 17, 2009
by GONZO
Re: Invaria - Dorothea confusion
In the Mayfly Genus Ephemerella by Entoman
17Feb 7, 2012
by Entoman
Re: Anyone know more about Ephemerella septentrionalis?
In the Mayfly Species Penelomax septentrionalis by Troutnut
11Jul 18, 2011
by Oldredbarn
Re: An important hatch
In the Mayfly Species Baetisca laurentina by Troutnut
2Apr 8, 2013
by Willy
Re: Ephemerella invaria female
(4 more)

In the Identify This! Board by Brookyman
8May 9, 2013
by Brookyman
Re: ES3-Blue---Ephemerel la invaria/rotunda
(7 more)

In the Identify This! Board by Brookyman
2Apr 1, 2013
by Brookyman
Re: So is Ep Infrequens now known as Ep Dorothea?
In the Mayfly Species Ephemerella dorothea infrequens by Wbranch
20Jul 1, 2014
by Crepuscular
Re: Male or female?
In General Discussion by Shawnny3
8Apr 9, 2009
by GONZO
Re: A Cinygmula nymph without protruding mouthparts?
In Cinygmula Mayfly Nymph by Troutnut
12Mar 28, 2013
by Brookyman
Re: need help on this one
In the Identify This! Board by Sandfly
7Apr 1, 2012
by Entoman
Most Recent Posts
Re: Stonefly?
In the Identify This! Board by Pdcox (Martinlf replied)
Re: Nymphing set up.
In Fly Tying by FC54 (Martinlf replied)
Re: Pretty float down the Yakima Canyon
In Site Updates by Troutnut (Martinlf replied)
Re: Homage to Louis: the Davy Knot revisited
In Gear Talk by Entoman (Martinlf replied)
Re: Quick customer service compliment to Korkers
In Site Updates by Troutnut (Partsman replied)