Skip Morris Gabriel's Trumpet Black Here's a very bright and fast-sinking attractor nymph that sometimes just cleans up on trout in rivers. It can be a hot fly on trout lakes too, when nothing else seems to work. Some surprisingly finicky, difficult trout have taken the Trumpet. The Gabriel's Trumpet, Black can be more than an attractor nymph, imitating dark mayfly and small stonefly nymphs.