Black Quill

Telling it apart

• Dark, almost blackish-brown body, with heavily tinted dark-grey wings — the name isn't an exaggeration.
• Size 12–14, noticeably bigger than the Blue Quill despite the similar name.
• Three tails, slim cylindrical body — typical of the Leptophlebiidae.
• Nymph found in margins and dead water, never in the main current — it crawls shoreward before emerging.

A migration toward shore

The most useful thing about this mayfly isn't visual, it's behavioural: in the days before the hatch, Black Quill nymphs gradually leave deeper water and gather in shallow, calm water along the margins — often in just a few centimetres of water.

That's why the hatch itself is rarely seen mid-current. It happens in small bays, along grassy banks, and in the quiet eddies just below obstructions — exactly the spots most anglers wade through on their way to the main seam.

Why everyone misses it

The Hendrickson comes off almost the same date, the same size, on the same river — and it's a spectacular hatch, concentrated in a precise one-hour window right in the current. An angler seeing olive-brown duns in the main seam naturally assumes they're all Hendricksons, and is right most of the time.

But look at the calm margins while everyone else stares at the current, and you'll often find a Black Quill population hatching with zero competition — and trout feeding on it having never seen a single artificial fly all day.

Fishing the margin like the main event

A calm bay or dead water asks for a different approach than a riffle: no current to hide a bad drift, so a quiet approach and a soft presentation both count double. Spot the light rises near vegetation before wading in — in water this flat, a trout that senses you will simply never rise.

A small dark dry, placed gently along grass or a submerged branch, imitates well a dun that just emerged a few inches off the bank.