Cotter Shrimp is a low water spring pattern. Designed on the river Tay at one of the finest fly fishing beats. The Newtyle beat below Dunkeld run by head ghillie Andrew Gunn. He is always tinkering with small flies on the mighty Tay with great success. This fly is named after one of the most productive streams on the Newtyle beat where Ronnie Fraser has lander many fish on this pattern.