Black Quill

Overview: The Black Quill Mayfly (Leptophlebia cupida), is a larger mayfly species that emerges primarily in the spring. Though not known for creating dense hatches, these mayflies are significant because their nymphs are a preferred food source for trout. They are often found in slower-moving waters and soft-bottomed streams, where their presence signals a hearty meal for opportunistic fish. Their emergence can provide exciting fly fishing opportunities when other hatches are sparse.

Nymph Stage: Black Quill nymphs are relatively large, ranging from 1/2 to 3/4 inch in size. They have a dark brown to blackish body with lighter, mottled markings, and slender, streamlined shapes. Hook sizes 10–14 are ideal for imitations. These nymphs are clingers, often found near debris or soft sediment. Dead-drifting nymph patterns along the bottom is highly effective, especially during pre-hatch periods when trout are feeding heavily.

Adult or Dry Stage: Adult Black Quills measure about 1/2 to 3/4 inch long. Their bodies are dark brown or black, with lighter undersides, and their wings are semi-translucent with a smoky hue. Dry fly imitations on hooks 10–12 are most effective. They tend to hatch mid-morning or early afternoon in spring, often in calm waters. Trout rising to these mayflies will strike aggressively, particularly when conditions favor the duns emerging and drifting on the surface.