Spent a hour out yesterday,On a small river,water very clear,was interesting to see just how wild they are,even with my shadow behind me a false move would spook em.Found a pool with 3 or 4 trout,one a nice size,first time through with bubble and couple of nymps or what ever they all had a look but no bite,Then spent ages taking every fly i had through some passing right over them,They just ignored them