There are many "wormy" looking creatures that live in aquatic environments. Most lakes and weedy streams have dense populations of leeches and aquatic worms. During much of the time, they are buried in the substrate or bottom vegetation. However, during low light conditions they often forage about where they are exposed to patrolling game fish. Trout and bass seek out these tender morsels and eat them like candy. This is especially true early in the spring before weeds start to grow. Leeches are your most important early season lake flies. If the water temperature is cold, they are most effective when fished slowly along the bottom with a sinking fly line. Swimming leaches are flat and elongated. They swim with an undulating, almost ribbon-like motion. The Bead Head Leech is designed to mimic this action. It's flat and has a black bead head that gives it a distinct swimming-leech action. Don't hit the your lake without some.
BLACK Bead Head Leech
If you only had one size and color for your earliest season fishing, make it a black size 6. This fly catches fish. It is worthwhile having the black Bead Head Leech in all of the sizes. Sometimes trout display a preference for a certain size. Like everything else, leeches start out small and grow bigger.
MAROON Bead Head Leech
Commonly referred to as a blood leech, patterns that are maroon in color are very effective in many lakes.
OLIVE Bead Head Leech
Some leeches are olive colored, this probably helps them blend in with aquatic vegetation. It is well known that a wiggly fly that is an inch long and green is a high percentage searching fly in most desert lakes early in the spring.