The following information on scuds and their fly patterns was taken from Previous Lake Columns section of Flyanglersonline. Philip Rowley's excellent book - Fly Patterns For Stillwaters, Frank Amato Publications, is the source of the information he presented in the links given below. Here then are Phil's ideas and views on stillwater scuds and their patterns.

Scuds, Part 1 - Gives a brief overview of the life cycle of scuds and the forms that they take, as well as their importance to trout and trout fishermen:

Scuds, Part 2 - Presents insights on scud coloration and its importance to anglers:

Thoughts On Scud Pattern Design -
This section gives information on the tying and fishing of effective scud fly patterns:


It is a little known fact that, equal weight for equal weight, midge larva and midge pupa contain double the caloric food value to trout that scuds do. The reason that scud rich lakes pack so much weight on their trout every year is that the scuds are available for the trout to eat all winter long, when the lakes are frozen over and the midges can't emerge, living as the midges do under the silt on the deep bottoms of the lakes, below the oxygen depleted lake waters where they are unavailable to the trout.

And if the angling conditions are right for presenting scud patterns to the trout, dawn, dusk or a heavily overcast and possibly rainy days, most scud patterns will often prove effective when given the right actions in the water by the angler. Even in lakes that have no resident scud populations, scud patterns are effective because the trout are instinctively and genetically programed to take advantage of scud populations where ever they can be found, so every high lake Tenkara angler should have appropriate scud (or Killer Bug) patterns in his or her fly box.