On most fertile trout streams, insects begin to hatch at predictable times-as a general rule during the most pleasant part of the day. So, stake out a favorite pool an hour or so before the duns appear on the surface of the water. Trout begin feeding selectively on nymphs as they rise from the bottom. If you know what species to expect, you can tie on an accurate nymph imitation and take fish. 9. Fish at night.
Smart trout abandon some of their caution after dark.
They emerge from hiding and go hunting for an easy meal. At this time they will strike the same bushy dry flies and fat streamers that send them scurrying for cover in daylight. Precise imitation and delicate presentation are less important at night, when even big, smart trout become more aggressive and impulsive. Trout will rarely take an imitation if the pull of the currents on the leader causes the fly to float unnaturally. You can prevent drag by using long, fine tippets and making casts that create curves and wiggles in the line and leader.