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> > Hatching Sulphur

This topic is about the Mayfly Species Ephemerella invaria

This species, the primary "Sulphur" hatch, stirs many feelings in the angler. There is nostalgia for days when everything clicked and large, selective trout were brought to hand. There is the bewildering memory of towering clouds of spinners which promise great fishing and then vanish back into the aspens as night falls. There is frustration from the maddening selectivity with which trout approach the emerging duns--a vexing challenge that, for some of us, is the source of our excitement when Sulphur time rolls around.

Ephemerella invaria is one of the two species frequently known as Sulphurs (the other is Ephemerella dorothea). There used to be a third, Ephemerella rotunda, but entomologists recently discovered that invaria and rotunda are a single species with an incredible range of individual variation. This variation and the similarity to the also variable dorothea make telling them apart exceptionally tricky.

As the combination of two already prolific species, this has become the most abundant of all mayfly species in Eastern and Midwestern trout streams. Read more...

There are 42 more specimens...

The Discussion

MartinlfOctober 14th, 2008, 6:09 am
Moderator
Palmyra PA

Posts: 3056
Click on "40 more specimens" and scroll down for one photo.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell

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