Woolly Worms are typically fished in streams, rivers, ponds, and lakes for trout, bass, and panfish.

Today, Woolly Worms are tied in a variety of styles and colors to imitate a large aquatic nymphs such as stoneflies, dragonflies, damselflies or hellgrammites.

Its real popularity however came when Don Martinez, a West Yellowstone, Montana fly tier commercialized the pattern in the 1950s.

Woolly Worm flies are typically tied on number 4 to 10 3X long hooks.

Variations include Woolly Worms weighted with lead underbodies or brass or tungsten beads.