
For a query like “spent,” the strongest matches are spent-wing and spent-stage trout flies. Fast Flies High Float Spent May Flies x 3 (Barbed) is the most direct match if trout are keyed on spent mayflies sitting in the surface film. Fast Flies 5 x Mixed May Flies (Barbed) gives you a small mayfly spread, including a spent pattern, which is useful when you’re not sure which hatch stage they want. The Fly Crate Spent Partridge Caddis is a good alternative when fish are taking a spent caddis or you need a searching fly. Barbless Flies Artisan Mayfly Taster Selection is the broadest hatch-match option, covering nymph through spinner/stillborn stages.
Switch away from spent patterns if fish are feeding deeper, ignoring surface flies, or the hatch is not on. In that case, a nymph, emerger, or different dry pattern may outfish a spent fly. If trout are focused on caddis rather than mayflies, use the spent caddis instead of the mayfly options.
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