Re: What are your favorite Yak dry flies

[Roger Rohrbeck]

Preston-   The following quote is from Rick Hafele/Dave Hughes in their recently published book, Western Mayfly Hatches:   "When ready to emerge, some Rhithrogena nymphs release their limpet-like grip on the bottom and rise quickly to the surface.  Others, especially R. morrisoni and R. hageni, are reported to escape the nymphal shuck as duns while the nymph is still attached to the bottom.  Some nymphs that leave the bottom and rise toward the surface pause a few inches beneath it, and the dun escapes the nymphal shuck there."   So the bottom line would appear to be, the Western March Brown (Rhithrogena morrisoni) may exhibit the emergence behavior you first described, at least on occasion.  However, there are sufficient exceptions in emergence behavior that it is risky to make any all-encompassing statements, like "they (always) emerge thusly."  For example, I'm aware of a mayfly, which customarily migrates to shore to emerge, but which during a high-runoff situation, may revert to a water-emergence.   Roger Rohrbeck www.FlyfishingEntomology.com ----- Original Message ----- From: Preston Singletary To: waflyfishers@waflyfishers.com Sent: Wednesday, March 16, 2005 2:17 PM Subject: What are your favorite Yak dry flies In my last post, I quoted someone as saying that March Browns emerged from their nymphal shucks on the bottom.  I apologize for passing that along as fact without verifying it.  I checked it out in one of Jim Schollmeyer's books and found this:  "And some duns will emerge from the shuck slightly below the surface.  At this time a March Brown Soft Hackle or Flymph fished just below the surface can be your best fly."