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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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    Barr's Emerger BWO

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    Excellent pattern when fish are on the surface but not hitting the duns. Trailing shuck make this a great pattern to cast upstream, and allow to ...

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    Flashback Pheasant Tail

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    Like all the Pheasant Tail patterns, this one has a spot in every trout fisher's fly box. One of the best all time emerging Callibaetis patterns, ...

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    Juju Beatis Flashback

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    Tied skinny on a curved nymph hook. Flash, excellent for skinny water, temperamentally challenged fish. Many nymphs develop a shiny back before ...

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    Barbless Pheasant Tail

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    A classic nymph, peacock thorax, slender pheasant tail body. The wire rib presents a nice segmented look, in addition to adding flash and durabili...

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    Golden Pheasant Tail

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    A great pheasant tail pattern that is especially popular in the PA area. Much like a traditional pheasant tail, but with subtle difference that ca...

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    BWO Poxyback

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    Quite simply one of THE great hatches. Many, many anglers rely on this hatch to provide them with the bulk of their warm weather fish. Begins as e...

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    Cove's Pheasant Tail

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    Everyone, in mean everyone, has a pheasant tail nymph in a fly box. The Cove's Pheasant Tail is yet another pattern spawned from the ingenious p...

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    Bear Baetis Nymph

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    Baetis are a extremely popular food source. This pattern is slim and flashy. Great in better much every column of water. Subsurface, deep down, or...

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    Green Lantern

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    The Superhero's strike again with another great fly. The Green Lantern resembles a midge nymph with a "POW" of green in the thorax to make this ny...

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    FOD

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    The FOD, aka the Fly of Destiny, is designed to be a BWO emerger. It looks somewhat like a Pheasant Tail tied on a curved shank with black ice dub...

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    Hot Spot Pheasant Tail

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    Like all the Pheasant Tail patterns, this one has a spot in every trout fisher's fly box. Hot spots make more sense that one might think at first...

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    Darth Baetis - Umpqua

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    This juicy little Baetis pattern produces fish under the spookiest of circumstances. From Colorado to Maine, baetis nymphs are a huge source of foo...

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    Flymph BWO

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    Flymphs have been around longer than most fly fishers realize. First coined by Pete Hidy in 1941, it is simply a floating nymph.  With today's cla...

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    Silver Streak

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    One 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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    Flash Quill Nymph

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    Blue Quill, Black Quill, Red Quill, Quill Gordon, are all essentially the same fly in different color variations meant to mimic a specific mayfly ...

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    Slam Dunk BWO

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    Blue 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

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    This 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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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.

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