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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Sparkle Duns Dry Fly
$0.89Original price $0.99Original price $0.99 - Original price $0.99Original price $0.99$0.89 - $0.89Current price $0.89A great emerger, dun, or cripple pattern. These flies ride low, have a trailing shuck, are easy to cast and see. Two excellent colors, for a plet...
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Split Case Emerger - Tungsten
$1.32Original priceOriginal price $1.32 - Original price $1.32Original price$1.32 - $1.32Current price $1.32This pattern is deadly when fish are keying on emergers. The emerging stage is when insects are the most vulnerable, and big fat fish slurp them u...
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Soft Hackle Pheasant Tail
$1.09Original priceOriginal price $1.09 - Original price $1.09Original price$1.09 - $1.09Current price $1.09Is there a time not to use this pattern? Excellent imitation of all major mayflies, especially during their emerging stage. Great for a searchin...
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Spanish Nymph - Tungsten
$1.45Original priceOriginal price $1.45 - Original price $1.45Original price$1.45 - $1.45Current price $1.45One of many highly effective patterns that originate in the Czech/Euro field. A slim body, synthetic fibers, and a tungsten bead help this patter...
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Spinner BWO - Mayfly Dry Fly
$0.89Original price $0.99Original price $0.99 - Original price $0.99Original price $0.99$0.89 - $0.89Current price $0.89Spinners are the adult stage of mayfly life that involves reproduction. Our spinner selection focuses on the spent-wing spinners, when mayflies ar...
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Sulphur Nymph-Beadhead
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99Sulphurs and Pale Morning Duns are fairly similar in look and no surprise that the staple nymph for both hatches are the Pheasant Tail. The Sulph...
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Soft Hackle Pheasant Tail Glass Bead
$1.19Original priceOriginal price $1.19 - Original price $1.19Original price$1.19 - $1.19Current price $1.19Swinging soft hackles for trout has gained some popularity of late. This pattern is particular designed with that in mind. While it can be fishe...
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S&M-Beadhead
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99Sinks quickly and catches fish. Tested on the Yuba and Feather Rivers in California Color contrast and flash, this will scream 'pick me' wh...
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Silver Streak
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99One of the hottest bwo emerger patterns. Popular from Sierra's to Arkansas and points east and west north and south. Excellent for dropper combo....
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Slim Pickens-Beadhead
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99This pattern is brought to us from one of our wholesale customers who raves of its success throughout the Midwest. An excellent mayfly imitation,...
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Silver Bullet Baetis - Tungsten - Umpqua (Barbless)
$3.65Original priceOriginal price $3.65 - Original price $3.65Original price$3.65 - $3.65Current price $3.65"The Silver Bullet Baetis is a sleek, fast sinking pattern perfect for hanging below a bushy dry, or on a nymph rig. This simple fly is durable, ...
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Slam Dunk BWO
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99Blue Winged Olives are the most important food source for trout. BWOs hatch from early fall through late spring and provide many trout with the bu...
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Slim Pickens
$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99This pattern is brought to us from one of our wholesale customers who raves of its success throughout the Midwest. An excellent mayfly imitation,...
View full details$0.99Original priceOriginal price $0.99 - Original price $0.99Original price$0.99 - $0.99Current price $0.99Value must be grater than or equal to 1.
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.