The Pheasant Tail is, without doubt, the very best may fly nymph imitation ever designed once you take a look at the natural active darter nymph you will realize why. For instance just have a look at the photograph of a Blue Winged Olive nymph and you will see that it is an excellent counterpart for it's silhouette and color. The nymph is meant to sink fast whilst presented up stream with a subsurface feeding fish. It works well while in the moving water of rivers along with the still water of lakes. It is one of the  most popular grayling flies used. Different types of may flies appear all year long, and the nymph stage is the easiest one for trout to discover constantly. May fly's nymphs are adaptable as they could live in fast, turbulent water, or in slow or still water environments. As a result of shuffling the gravel in a stream or lake, and searching on stream bed rocks, you will find the nymphs but it's a simple matter of matching the fly size to get a realistic equal. The may fly nymph in a stream river or lake bed will make an effort to hide which enable it to be difficult for trout to discover nothing like the mature nymphs that rise towards the surface to emerge into the adult dun may fly.

If you observe trout darting backward and forward below the water they really are grabbing rising mature may fly nymphs as they may be swept past on the current. A fly fisherman do not need a heavily weighted artificial fly fishing fly to replicate these ascending nymphs. By means of it's smooth profile the pheasant tail nymph penetrates the water surface instantly and sinks promptly. When lifted gently before or beside a grayling to simulate the upward movement of a actual natural nymph rising towards surface you possibly can induce a 'take'. To detail the effectiveness of this pattern, Gary Borger, in the book Nymphs, wrote that when he received Frank Sawyer's book for his birthday and tied some Pheasant Tail nymphs for use on a Montana spring creek. In his initial encounter with this fly, he caught 27 fish in one hundred feet of stream in only two hours, every one between 1 and 3.5 pounds!