In an earlier blog post we sang the praises of the Blue Flash Damsel (BFD) and how it can either be fished slowly to imitate a natural insect or stripped fast as a lure.
Taking this further, it's clear that different flies need to be fished in different ways. Some fast. Some slow. But if you're fishing a natural fly such as a nymph it's important to introduce a pause into your retrieve.
Why? The pause imitates an insect resting after moving through the water. And it is often at this point that a trout will often take its prey. The theory is that the fish recognises that the insect is vulnerable and that's when it attacks.