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.
Entoman on Mar 5, 2013March 5th, 2013, 2:33 pm EST
We get 'em out here up to size 8! Most are in the 12 to 16 range. The partridge is spun in a loop, Spence. The hackles are too short and the barbules too long to wrap conventionally. First dub the thread, form a loop, and insert the barbules to the proper length horizontally on the dubbing and twist the loop up enough to trap them. then trim off the stems along the edge of the thread so the barbule bases don't show. Finish twisting up and wrap on the shank over copious quantities of lead. It's a bit tricky to do. I'm thinking of investing in one of those Petitjean tools to simplify and speed things up...
Most aren't speckled like Eric's specimen. They come in all shades of gray, tan, and olive (some greenish yellow or even peachy cream). I pretty much stick with this aqua tinted gray & partridge and a greenish olive version tied with plain hen hackle. For the tannish ones, I just use a Bird's Nest (as I probably would for Eric's). In sizes 12 - 18, they cover the spectrum for 90% of the ones I've ever run into (of which 75% are covered by the olive). Some of the lakes I have fished (particularly in OR) have the big boys. I just trim up a small Crystal Bugger to deal with those if I have to.
"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