Po Toi
4th May, 2013
To us some features which suggest more towards 
owstoni / 
elisae rather than 
narcissina:
*creamy yellow on eye-ring.
*tint of yellow on throat.
*yellowish wash on belly.
*greenish tint upper part rather than brownish.  
Here is a chart from Nial Moores's (Birds Korea) paper on ID of 
owstoni / 
elisae / 
narcissina : 
http://www.birdskorea.org/Birds/ ... atchers-types.shtml
Comments are most welcome!
Cheers
PWMK