The Hairy Mary Double Hook Fly is a long established and highly respected pattern in sea trout and summer salmon fishing. Tied on a quality double hook, this version offers improved balance and stability in the current, helping the fly track correctly through deeper pools and steady glides. The added strength of the double hook provides reliable holding power when connected to powerful fresh run fish.
Recognised for its dark body and vivid blue hackle, the Hairy Mary creates a strong underwater silhouette. The contrast between black and blue gives the fly a subtle attractor quality, while the mixed bucktail wing produces natural movement as it swings across the current.
This pattern is particularly effective during low light periods and at dusk, when sea trout begin to move and feed more confidently. Its slim yet lively profile allows it to fish at the correct depth without excessive drag, making it suitable for both rivers and larger spate systems.
Hook Type - Double Barbed, Mustad of Norway
Tail - Crest
Body - Floss Black
Rib - Gold Line
Hackle - Cock Blue
Wing - Bucktail Natural mixed with Yellow Bucktail
Head - Black Silk
Target Species - Sea Trout/Salmon
Double hook construction helps the fly swim straight in stronger flows.
Black body and blue hackle create a defined underwater outline.
Effective for sea trout and summer salmon in a range of water levels.
Cast across and slightly downstream and allow the fly to swing naturally through the pool as light fades. Sea trout often respond confidently at dusk.
In higher water, fish at an angle and let the fly sweep steadily across the current, maintaining tension throughout the drift.
Add short pulls during the swing to make the bucktail flare and the hackle pulse, encouraging reaction takes.
Use during summer conditions when a smaller, balanced profile is needed to tempt salmon in clear flows.
The Hairy Mary Double Hook Fly remains a dependable and traditional sea trout fly, valued for its movement, contrast and consistent performance in both low light and summer river conditions.