Crayfish represent a huge base of food for larger fish when they are present in the same waters. Many trout anglers could also benefit from fishing crayfish patterns, as they are available in most trout streams and large trout pay as close attention to them as bass in a pond do.
A good way to fish this pattern is to cast quartering upstream in areas of moderate depth and current. Allow the fly to sink on a slack line, mending the line as necessary. Be alert for takes as the fly sinks and drifts. When the fly starts to swing, start a strip-and-pause retrieve. In areas with a sand or gravel bottom, the fly can be cast up or up-and-across current and hopped along the stream bed. In lakes, I like to cast along rocks and gravel, and beside weed beds, alternating retrieves between pauses.
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