N10. The Timber Wolf Nymph (or Eric's Beetle)

I have included this fly in our nymph section because it is fished like other nymph flies. It originated in England and was given the name Eric's Beetle. It  was designed by Eric Horsefall Turner for use on the river Derwent in England. It then gained popularity on other rivers and is used successfully on stillwater. It can be fished either just below the surface or weighted on the bottom like other nymphs. I personally think it also does a good imitation of a bumble bee or wasp that has been blown into the water and drowned. This pattern has crossed the Atlantic where it has been called the Timber wolf. It does not matter what you call this fly it is a great fish taker

A BRIEF HISTORY OF NYMPH FISHING
Many of the very early flies fished below the surface were being used in the North of England and Scotland. Many of these wet fly techniques were being developed into a fine art. Down in the South of England , during the Victorian era, on the clear chalk streams of Hampshire and Wiltshire it was the floating or Dry Fly technique that became popular in fly fishing  circles. It was considered the most sporting method of tempting trout. By the end of the nineteenth century the rule of 'dry fly only' had become entrenched on most rivers. this was despite knowing fact that large river fish rarely feed on the surface. These values were transported around the British Empire.

However this dogma was challenged by one G.E.M. Skues, who fished on the famous River Itchen. Skues made himself very unpopular with the Victorian dry fly traditionalists, by singing the praises of a nymph pattern fished just beneath the surface to represent a hatching fly. Eventually Skues' arguments won the day and on most chalk streams the rules were changed so Gentlemen could fish either a floating fly or a nymph. 

With the 'rot' having set in, Frank Sawyer, a South England, Hampshire Avon river keeper, publicized his new 'induced take' method of fishing a heavily weighted nymph from near the river bottom. A method still widely used on both chalk and rough water streams.

With the building of  reservoirs for public water supplies the opportunity for trout fishing increased in areas that previously had poor fishing resources. Many of the reservoirs are extremely deep and new nymph fishing techniques and lures have been developed to tempt the huge trout that live at the bottom. The growing popularity of stillwater trout fishing has led to many farmers and landowners digging trout pools as an extra source of revenue. These small stillwater lakes and ponds make fly fishing accessible to more people.

FISHING MOUNTAIN LAKES
The secret to understanding Summer fishing in mountain lakes is to remember that the wind blows up hill. What is he talking about I hear you saying to yourself. What on earth has that got to do with fishing? It has everything to do with Mountain Fishing. Terrestrial insects like grass hoppers, beetles and ants make up 80% of the summer diet of trout and grayling in alpine mountainous environments. They are carried up the mountain by the wind and deposited in the high altitude lakes. (the biologists call them 'upslope blow-ins') Combine this with with the amount of emergent or adult forms of aquatic insect life taken in the surface film then you find that 90% of their food comes from the top. The mountain lake trout cruise and search for food on the water surface film and this is where you should be fishing.

The upslope winds occur when the high ridges receive the morning sun whilst the valleys are still in shade. The cool air of the valley bottom is sucked up to the ridges as the layers mix in an effort to equalize the air temperature. The greater the temperature disparity the stronger the winds. Bug falls are greater in the afternoon. The lake is a heat sink as it is cooler than the surrounding land and therefore creates a thermal variation and downdraft.

Ants are easily plucked from the surface by the winds even by mild winds. They are often the most numerous insect dropped on the water surface because of their low weight. Production of single cell organisms are low and rooted plants are sometimes absent due to the low average temperature . Two winged diptera midge flies are the most common aquatic insects. There are no major hatches of Caddis, Damselflies or Mayflies on many of these lakes. If it has rained within the last 24 hours runoff from a rainstorm will bring drowned spiders, bees, worms and insects into the lake. A Timberwolf, black soft hackle spider or San Juan Worm will bring results fished dead drift. On windless days flying insects still blunder their way onto the water. Just leave a pan of water out for a day and you will find moths, flies and bees floating in the surface