Midge is a generic term for a large number of tiny aquatic insects.  Midges are so small that you would think trout would ignore them, but the fact is, the tiny midge is another very valuable year-round food source.  The midge pictured here represents the larval stage of the life cycle. Midge imitations are also tied in the emerging stage (soft hackle) and the adult stage (dry fly).

Some species of midges will hatch every month of the year so it is a necessary addition to your arsenal. It would be almost impossible to have every color, size and type of midge in your collection, therefore I recommend that you ask someone in your local fly shop what the current hot pattern is.