Perhaps no fly has taken over angling quite like the squirmy worm. The motion of the squirmy material drives trout crazy, and combining that with a jig hook and tungsten bead makes this pattern even deadlier. While the effectiveness of the squirmy is documented everywhere, it’s especially productive in pocket-water freestone streams. It’s perfect to use trailing behind a chubby chernobyl or hopper in those tiny little slicks and pockets behind a boulder. The length of tippet between the dry and squirmy can be altered based on the depth of water being fished, but generally the squirmy works great when it’s fished in the middle half of the water column, allowing maximum range of movement for the tail.
If there are trout in a water odds are they will eat a squirmy worm. Use this pattern in high water conditions as well as right on the banks, where aquatic worms might naturally fall into the stream. It also serves as an excellent trailing fly in a mini nymph rig as it plays up and down throughout the water column.