148 ANIMAL LIFE UNDER WATER 



hackle made of good reflecting material, all of 

 ,which points to the fact that it is the increased or 

 diminished amount of "flash" which gives 

 success. 



The fact that many salmon rivers have their 

 more favoured flies has been advanced in support 

 of the value of colour in different patterns. I go 

 further and say, every pool that has distinctive 

 features — e.g. overhanging rocks or trees, or 

 with flat, low-lying banks — has its more favoured 

 pattern. This is not, however, dependent on 

 its colour, but upon its light-reflecting power. 

 The "flash" must be sufficient to attract the 

 fish without causing it to refuse or come short, 

 when it follows up the fly. 



The value of the feathers as feathers lies in 

 their movement, which suggests that the fly is 

 alive. 



In almost every pool there is a particular 

 spot where the salmon lie. Not infrequently 

 that spot fishes best from, say, the right bank 

 in the morning and the left bank in the evening. 

 We can find an explanation for this in the 

 " flash " of the fly and whether this " flash " is 

 correctly timed as it passes the fish. 



My point will be readily followed by an 



