It is difficult to make a general statement about grayling fly preference. There are dry fly days, deep nymphing days and even an occasional wet fly day. Which is a good thing, for the fickle Fortune in its unpredictability is certain to reward a fisherman who is willing to experiment and not to take anything for granted.
Having said that some fly features have more appeal than others. On most days the grayling prefer small flies over large ones, and a hint of pink is usually appreciated. Combining these two characteristics in a single fly increases its appeal even further.
This little fly has served me well. As a funny side note: I have been told the fly - when viewed sideways with a squint in the eye - resembles a thistle flower. I wonder what my Scottish friends think of that...
#18 Hanák H130 BL hook
2mm gold bead (brass in this case)
a tag of 4 strands of Glo Brite floss
gold Gütermann tinsel ribbing
red fox dubbing, lightly teased out with a velcro strip