A specialized pattern designed to specifically mimic the emerging stage of the grannom caddisfly,
How it's tied
The Grannom Emerger is tied on a curved or straight nymph hook. The body is typically made from a blend of dubbing, often in shades of olive or green to mimic the natural insect. The tail and optionally legs are usually made from dark, fine fibers that add to the insect-like silhouette.
The head of the fly is usually made with the tying thread, and then finished with a whip finish and head cement for durability. To mimic the natural insect's color variation and segmentation, the abdomen can be ribbed with a contrasting thread or wire.
What it mimics
The Grannom Emerger fly is designed to imitate the emerging stage of the grannom caddisfly as it transitions from a pupa to an adult, an important food source for trout and other fish species.
Where it's used
The Grannom Emerger is most effectively used in rivers and streams during a grannom caddisfly hatch, which typically occurs in the spring. It can be fished just beneath the surface to mimic a rising emerger, or deeper in the water column where trout are feeding on ascending pupae.
This fly pattern is primarily used for trout, but can also be effective for other species that feed on caddisflies, such as grayling.