Hi Brendan, 
I approached from the path from Lam Tsuen but I am sure it must be straightforward from Lin Au. There is a wide grassy area behind the village, I walked along a concrete path beside a stream.  The birds were just past the last plot of agriculture.  
The birds were perched prominently at first and then into long grass.  There were masses of Chestnut buntings too.
A taxi from Tai Po Market or Tai Wo would probably be easiest; there may be a minibus but it is a small village so I doubt it.  The walk from Lam Tsuen takes forty-five minutes to an hour at least. The path is not that clear, quite overgrown.
Good luck with it.
Dylan
[ Last edited by subbuteo at 3/12/2012 23:00 ]