....................... ......Fly Fishing Yellowstone National Park
New "Perfect Fly" Inch Worm
After several tries, we have finally got our "Perfect Fly" Inch Worm fly like we want it. They are now in stock and can be ordered from the website. They come in hook sizes from 10, 12, 14 and 16.
The inchworm, also called the spanworm, looper, and measuring worm, is the larva stage of life for the moth. There are numerous species of them in Yellowstone National Park.
Inchworms are a yellowish/green color. Most of them are green. At times the worm like larvae will suspend several inches from limbs on a silk thread they produce. They do this hanging act when they are ready to pupate. It is common for them to fall into the water. In fact, if they are suspended over the water, they are going to fall into the water.
A good time to try an inchworm pattern would be when you spot a few of them hanging from tree limbs, especially during those times when a major hatch is not underway, which is ninety percent of the time. If you have not seen any of them on the banks it very unlikely there will be any in the water. That doesn't mean you can't catch fish on the fly. You probably can even if there are no inch worms simply because the fly also closely resembles other food such as Rock Worms (free living caddis larvae) and some of the net-spinning caddis larvae.
The different species of inchworms pupate at different times of the year. You will find them throughout the summer but heavy only at certain times. Once the trout have seen them, it doesn't seem to matter if they are lots of them or not.
Presentation: As with most terrestrials, in the larger streams you should fish the "Perfect Fly" Inch Worm Fly near the banks concentrating on those with overhanging limbs of trees and bushes. The fly can be fished with or without any added weight A very good method is to use a large fly such as a hopper as an indicator and fish the inchworm larvae imitation below it at a depth depending upon the depth of the water you are fishing. Not only is the large fly a good strike indicator, it may also get some action from the trout. Of course you can also use a strike indicator. We almost always fish the fly without an indicator or a large dry fly tandem rig. You can detect the strike simply by watching your line and leader. That is our preferred way of fishing the fly.