What are your favorite patterns/recipes for this fly?
Thanks,
Joe
I use these:
Info here if your interested: http://www.flyanglersonline.com/bb/showthread.php?39333-Bi-Vis-Emerger
This one…
SPLIT/ WING CASE BAETIS NYMPH
HOOK: Daiichi 1130, #16-#22, TMC 2487, #16-#22, Mustad c49s, #16-#22
THREAD: Gordon Griffith 14/0, Sheer, Gray
TAIL: Lemon Woodduck
ABDOMEN: Premo Goose Biots, Blue Winged Olive, or Olive, or Natural
RIB: Largutan, x-fine Gold wire
THORAX: Wapsi Beaver Dubbing, Dark Tan
LEGS: Lemon Wooduck
UNDER WING CASE: Wapsi, Razor Foam, Translucent Dun, 1.0 MM
OVER WING CASE: Spirit River Holographic Mylar Motion, 1/64″, Black…three strands, each side, to edge of pulled over foam, this IS tricky…patience prevails…
PT/TB 
That is one beautifully tied fly!!!
Both of these look great. Good job Hairwing on the split wings and design. I like yours too planettrout. I’ve seen a lot of biot bodies lately but don’t have much experience with them. How well do they hold up to fish teeth or do they fall apart quickly?
Greg
The biot bodies hold up quite well, and you could rib them with 7x tippet if you started catching so many fish they were getting shredded.
I have not had a problem with the biots coming apart or tearing ( and I tie a lot of biot body flies)…this article is a good guide for tying with biots:
http://flyanglersonline.com/flytying/tyingtips/part102.php
Here: are split case patterns that can be applied to Baetis/ BWO’s that are tied by two friends:
http://www.mkflies.com/page2.php
http://stevenojai.tripod.com/splitcase.htm
And Greg Vinci ties the “Crack Back Baetis” which is another approach to this stage of emergence…
I’d link, but the site is down for reconstruction…
PT/TB
An acquaintance of mine came up with a pretty good fly imitating the emerging olives back in the early '70’s. Rim liked to take a few home for the dinner plate and he was always a resource for stomach autopsies at the stream from which we would conclude that the fish were taking the baetis nymphs. His first bunch of imitations being only slightly different than what you find today, but all have the characteristic little wing bud of the hatching nymph. He imitated them with a tuft of fine hair or feather fluff at the thorax and a very thin body typical of the baetis. A friend of his, Andy from CO. Springs, came up with a name for the fly with him several months later and from then on was referred to as an RS2. I think that Rim Chung would tell you his preference for the BWO would be the same fly he’s been using for over 35 years and other guys have noticed the same results.
Here’s what it looks like: http://web.me.com/ferencho/RS2/RS2s.html
Funny thing is that I’ve never fished one, so you will have to be the judge. I do know though that Rim can catch his fare share of fish.
Just wondering. Do you guys feel that the split case adds to the fish catching? I’m not being a smart— when I ask. Just inquiring.
Thanks,
Bruce
In my experience, it depends on what the fish are prone to taking on any given day…sometimes, those will work well and on other days, a flashy , black wing case emerger (like a Silver Streak Variant ) will work better…
PT/TB
Re: Rim’s RS2. I noticed last year that it was a popular pattern in the shops around the Frying Pan. I’ve used this fly for more than a few years and it does work. For an emerger, I prefer tying it with snowshoe rabbit foot for the wing, as in almost all my emerger pattern ties. (works better for me anyway). The reason is the way snowshoe can be pulled under the surface and with a little slack it rises back up, just like an emerging bug. So that’s my particular variant on that fly. Not sure if it can be called the RS2 in my box or not, but I call it that.
Here is a video on how to tie the RS2.