The Stream Doctor

March 24th, 2003

Email YOUR Questions directly to the Stream Doctor. This is your opportunity to get an experts professional opinion on anything stream related.

Q. What is a ephemerella subvaria?

A. Ephemerella subvaria is the Latin binomial (two-part scientific) name of a mayfly. The first name is the name of the genus, or generic name; the second is the species, or specific name. These are analogous to our designation as Homo sapiens. Eastern and central North American anglers call this mayfly the Beaverkill, Bluewinged Hendrickson, Brown Hen Spinner, Hendrickson, Lady Beaverkill, and Red Quill. Thus, although specific organisms, in this case a mayfly, can go by many common names, there is only one scientific name.

~ C. E. (Bert) Cushing, aka Streamdoctor
105 W. Cherokee Dr.
Estes Park, CO 80517
Phone: 970-577-1584

The 'Stream Doctor' is a retired professional stream ecologist and author, now living in the West and spending way too much time fly-fishing. You are invited to submit questions relating to anything stream related directly to him for use in this Q & A Feature at

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