Hatch Imitations

Flies That Imitate Aquatic Worms

3 proven patterns designed to match aquatic worms across multiple life stages. From subsurface nymphs to surface duns, these are the flies that consistently fool selective trout.

San Juan Worm fly pattern
Nymph

San Juan Worm

Love it or hate it, it catches fish — lots of fish.

Sizes 10–16

Mop Fly fly pattern
Nymph

Mop Fly

The Mop Fly — made from a strip of chenille mop material on a jig hook — is the most controversial a

Sizes 10–14

Squirmy Wormy fly pattern
Nymph

Squirmy Wormy

A controversial but devastatingly effective pattern using a squiggly silicone body to imitate aquati

Sizes #10–#14