The Beaverkill remains in good shape thanks to continuing rain showers. A good variety of flies have been hatching during the day and evenings – watch for Blue Winged Olives, assorted Caddis flies, Sulphurs and Light Cahills and some remaining Green Drakes, which were reported on the upper river this week. The Green Drake is named for the pale greenish tinge to its graceful upright wings; this large size #10 fly is known to bring up the largest trout in the river to feed on the surface. In the evening, the spinner (spent) form of the Green Drake, called Coffin Flies, should be on the water.
There are two adult life stages that have specific names – Duns and Spinners. When the flies first emerge from the water after exiting their nymphal shucks, they are called Duns (not to be confused with the color “Dun” that is a brownish-gray color commonly used in tying flies.) The scientific term for “Dun” is “Sub-Imago”. The second adult life stage of the mayfly occurs after molting – usually on land. They molt into a fully mature stage called the “Spinner” stage (the scientific name for this stage is “Imago”) during which they mate and deposit their eggs on the water. Afterward they become weak and then eventually die. Most spinners fall to the water in the evening, which is where the term “evening spinner fall” is derived.
With water levels as good as they are, fishing should be productive all during the day; however the best fishing during this time of year will be in the evenings up until dark. Remember to choose a fly that is similar in size, shape and color to those that are hatching or on the water.
When no flies or rises are apparent, try a large streamer below the surface. In dark or cloudy water a bead-head or cone-head fly will be easier to see.
In addition to the dry flies listed above, Beaverkill favorites include the Adams in sizes #16 - #18 and the Elk Hair Caddis in size #14 in the faster water. If you’re using flies in sizes #14 or #16, use a 5X tippet. For sizes #18s, tie on 6X and make your presentation the best it can be.