Hackle used on these flies is Brahma hen saddle
The recipes for these flies came from John Robert’s “Dictionary of Trout Flies” 1st ed.
The hackle recommended as a substitute for unobtainable Dotterel was Plover, which is now just as unobtainable.
When I saw these dyed Brahma hen saddles called ‘Plover’, I thought I would see what they were like.
  Not too bad, although how much like real Plover, I’m  not so sure.
This is the real article.
Picture sent to me
by Jim Smith at
Now I’m sure,
no comparison.
Page 56.