The Olive Fritz works superbly when fished using various rates of retrieve. The pattern can also be tied in a mass of colours from dark to very bright on the colour spectrum. The darker coloured fritz's are usually fished more slowly than the lighter coloured ones.
The olive fritz is an excellent pattern to imitate the damsel fly nymph and can be tied in various shades of olive.
Various shades of olive can be used in this pattern, 0ne of my favourites is golden olive.