Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
In the East and Midwest this is one of the most important hatches of the Spring. They are large flies which emerge sporadically, making for long days of good fishing.
This species contains the two classic Eastern hatches formerly known as Stenonema vicarium and Stenonema fuscum, the "March Brown" and "Gray Fox." Entomologists have discovered that these mayflies belong to the same species, but they still display differences in appearance which the trout notice easily. Anglers should be prepared to imitate both types.
LittleJ on Mar 12, 2007March 12th, 2007, 8:09 am EDT
I thought "gray fox" were fuscum?.......did they eliminate that species when they went from stenonoma to maccaffertium? just when I think I'm getting the hang of this bug jargon you guys send me another curveball:)