Green Machine Skwala Tutorial
The Green Machine was originally tied to imitate a Skwala stonefly which is a late-winter to early-spring hatching stonefly here in Montana. The original Green Machine is tied with brown/olive two-tone foam, with the olive tied down as the underside of the body to match the greenish belly of a Skwala adult. In addition to being a great Skwala pattern, I’ve tied the Green Machine in darker two-tone colors like tan/cocoa to imitate caddis and in lighter colors like yellow/tan or cocoa/flesh to imitate grasshoppers.
The Green Machine is a must have fly in every fly box because of its versatility for imitating caddis, stoneflies and hoppers. This little pattern rides high and is easy to see because of its thick foam body and deer hair wing and fish seem to confidently take this fly year after year.
Thread: UTC 14o denier. I usually use a contrasting color for this fly like yellow thread against green foam or brown thread against tan foam.
Tail: Brown biots
Foam: Two-tone foam with a total thickness of 4mm.
Underwing: Crystal Flash
Wing: Deer Hair. I tie a few patterns with bleached deer hair as well. The bleached hair is easier to see in low light situations.
Post: White polywing
Step 5: Prepare two-tone foam strip. Width of foam should be about hook gap in width and 2″ long. The original Green Machine has a pointed tapered tail. I used a medium pre-cut foam body above.
Step 13: Apply two loose wraps of tread around butts of deer hair. Next, tighten down loose wraps of thread by firmly pulling down on bobbin. Apply 1-2 firm wraps of thread to secure deer hair.Step 14: Apply z-lon post with 1-2 firm wraps of thread at same tie-in point as deer hair.
Step 18: Trim head of fly to shape and trim legs to length. Notice legs on this fly are pretty short… each of 4 legs are about length of body. Trim post. Post should be about length of deer hair. Trim butts of post close to tie-in point.