What are your favorite Yak dry flies

[Preston Singletary]

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."