BWO or Baetis
Blue Wing Olive hatches are one of the most consistent and important mayfly hatches for trout, especially in spring and fall.
Best Flies for the Blue Wing Olive (BWO) Hatch
Best time: Overcast days, late morning to afternoon
Season: Spring and fall (can occur year-round)
Water: Slow to moderate currents, tailwaters, spring creeks
Trout behavior: Selective feeding on small mayflies and emergers
Match your fly to trout behavior—dry flies for surface feeding, emergers for selective fish, and nymphs when trout are feeding below.
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Blue Wing Olive - Mayfly Dry Fly
$0.98Original price $1.09Original price $1.09 - Original price $1.09Original price $1.09$0.98 - $0.98Current price $0.98The Blue Wing Olive is a must-have for matching one of the most consistent and important mayfly hatches across trout fisheries. When conditions tur...
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Parachute Blue Wing Olive - Mayfly Dry Fly
$0.98Original price $1.09Original price $1.09 - Original price $1.09Original price $1.09$0.98 - $0.98Current price $0.98BWO is one of the most prolific and long lived hatches. This versatile color can also cover both the Pale Morning Dun and Pale Evening Dun. If you...
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Mercury Flashback Pheasant Tail
$0.89Original price $0.99Original price $0.99 - Original price $0.99Original price $0.99$0.89 - $0.89Current price $0.89Your all-time favorite pattern with a bead that imitates the gas bubble nymphs ride to the top. This one will quickly be one of your must-haves. ...
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Bead Wing Midge - Solitude
$1.98Original price $2.20Original price $2.20 - Original price $2.20Original price $2.20$1.98 - $1.98Current price $1.98One can never have to many midge patterns, and this a great nymph to add to the box. Bead Wing gives this emerger a look that only a transparent ...
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Baetis Dun - Mayfly Dry Fly
$0.89Original price $0.99Original price $0.99 - Original price $0.99Original price $0.99$0.89 - $0.89Current price $0.89The marvelous baetis like the energizer bunny, just keeps on ticking. A very exact imitation of baetis during many hatches. These insects can va...
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Blue Wing Olive (BWO) hatches often bring out selective trout, especially on pressured rivers and tailwaters. Matching size, profile, and presentation is usually the difference between refusals and eats. Most BWO fishing happens in sizes 16–20, with emergers outfishing dries when trout are feeding subtly in the film. Target softer seams, eddies, and slower edges during active hatches.
BWO hatches peak in spring and fall and are strongest during overcast or rainy weather. These mayflies can hatch multiple times a year and often produce longer, more consistent windows than other mayflies.
Trout key in on specific stages of the insect, so adjust your flies as their behavior shifts. Use dries when fish are rising confidently, switch to RS2s or emergers during subtle sips, and downsize if fish are refusing your presentation.