Rusty spinner: imitation of small olive ephemera that change colour after dying and drift on the surface. Trout can become exclusive when they feed on this type of insect
Chiro Tag CDC: mainly used on lakes, the chironomid can also be very effective on slow-moving rivers. Always fish in the meniscus
Caenis: these small flies drift in packs at times of mass hatching. The fish focus on them and ignore everything else