In the spring and autumn weighted tube flies may be required, but if the water is low, flies tied on larger doubles or trebles will be sufficient. In summer bring doubles and trebles down to a size 12 or even smaller on some tributaries. Flies such as the black shrimp and the nessc were devised on the River Ness, and often prove to be the anglers choice regardless of the season.
The experienced angler will always have favourites, but in general, spring and autumn, 2 inch tubes and Waddington's fish well. A good guide for fly colours is the time of year. In spring, fish natural spring colours and in autumn, fish natural autumn colours. Stoat's Tail, Willie Gunn, Ally's Shrimp in size 8-10 doubles are also worth carrying.
For sea trout and grilse, Teal Blue and Silver, Peter Ross, Stoat's Tail and Invicta in sizes 10-12 together with light tubes of 1/2 inch are ideal.