By the middle of Spring we begin to see the first hatches of the Mayfly, as the cold of winter eases off and the weather warms and you have began to feel the urge to go down to the river and fish.
You will see nymphs floating along the surface as the mayfly emerge and then take off into flight. At this moment the mayfly is at great risk of being taken by a fish, as the trout rise up and many times a feeding frenzy takes place.
This fly achieves deception not only because it looks something like the real thing, but also because it behaves so naturally, alighting gently onto the water like an egg laying spinner or a dun mayfly needing a second attempt to take off. It is important to cast gently and that means not covering too much water with each cast.