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CDC Baetis Emerger Trout Fly, picture
Price: $2.25
Availability: In Stock 1-2 day
Item #: DRY100 -

Baetis CDC Emerger More Information on Winter Baetis Hatches

Baetis Comparadun trout fly, picture
Price: $2.25
Availability: In Stock 1-2 day
Item #: DRY280 -

Baetis Comparadun Trout Dry Fly More Information on Winter Baetis Hatches

Baetis Sparkle Dun, Gray/Olive Baetis Sparkle Dun, Gray/Olive
Price: $2.25
Availability: In Stock 1-2 day
Item #: DRY800 -

More Information on Winter Baetis Hatches

Blue Wing Olive Thorax Blue Wing Olive Thorax
Price: $2.25
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Availability: In Stock 1-2 day
Item #: 26-0060- -

Blue Wing Olive Thorax Read: Keys to the Winter Baetis Hatch

CDC Tailwater Dun BWO Trout Fly, picture
Price: $2.25
Availability: In Stock 1-2 day
Item #: DRY172 -

CDC Tailwater Dun BWO More Information on Winter Baetis Hatches

Flash Cripple, Blue Wing Olive Flash Cripple, Blue Wing Olive, dry fly, trout fly
Price: $2.25
Availability: In Stock 1-2 day
Item #: 10-0030- -

Flash Cripple, Blue Wing Olive More Information on Winter Baetis Hatches

Hi-Vis Parachute Adams, Picture
Price: $2.25
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Availability: In Stock 1-2 day
Item #: DRY470 -

Hi-Vis Parachute Adams, Fluorescent Red & Chartreuse Wing This pattern incorporates a fluorescent red and chartreuse Antron wing post. The wing color is easier to see than white when fishing where there are a lot of foam patches on the water. Hi-Vis Adams are great for a lot of different mayfly hatches, including callibaetis, mahogany duns and winter baetis when used in the appropriate sizes. ...

Marks Winter Baetis Emerger Marks Baetis Emerger, Black and Chartreuse, trout fly, mayfly emerger
Price: $2.25
Availability: In Stock 1-2 day
Item #: 20089 -

Mark's Winter Baetis Emerger Trout Fly Winter Baetis Mayflies can be very dark colored. Many nymphs are jet black. The outer skin of the nymph is transparent olive. It is stretched over the dark colored insect inside. As the nymph swims to the surface the adult insect is already separating itself from the nypmphal shuck. Bright green bands form at each abdominal segment. As the skin splits down the back of the head and between the wing pads of the nymph, the dun starts to emerge through this...

Winter Baetis Equalizer Kit Winter Baetis Equalizer Kit
Price: $29.95
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Availability: In Stock 1-2 day
Item #: Baetis-Kit -

These are the flies you will need to succeed when fishing the Baetis hatch on rivers west of the Rockies during the winter months. 15 flies in all, contained in a single compartment, snap lid, reusable plastic box. Kit Contains (3) each: Mark's Winter Baetis Emerger #18 Blue Wing Olive Thorax #18 Baetis Sparkle Dun, Gray/Olive #18 WD-Flashy, Black #18 Bead Head Lightning Bug, Black #18 ...

Compiled by: Mark Bachmann

Baetis mayflies are an extremely widespread genus and are found in both the western and eastern United States. The west's great fly fishing entomologist Rick Hafele tells us that there are at least five sub-species of Baetis that hatch from Oregon's streams and lakes.

Hatches can occur nearly any time of year. This makes them common trout food and therefore very important to fly anglers. Several species are multi-brooded and may have two or more generations per season. All of the streams in the Deschutes basin have strong reoccurring Baetis hatches.

The Latin name is the popular name used by the angling public. They are also commonly called blue-winged olives. However Baetis can also have tan or gray bellies as well. Trout can be very selective and prefer one shade over another. Most Baetis look gray on the water and can be quite deceptive. It pays to catch a hatched insect and examine it closely under magnification. Baetis are small, #16-20, but they hatch in big numbers. The best hatches occur heaviest on overcast, rainy days. This makes them significant early season and late season hatches. Baetis hatches go on all winter. Hatches can start in late morning and extend into early afternoon.

Baetis nymphs are swimmers. They inhabit many water types in streams, but prefer weedy riffles and runs. Use a "kick screen" in the morning. If you find Baetis nymphs with wing pads that are very dark, chances are there will be a hatch during that day. Nymphs will start getting restless in the morning. This is a good time to pound the bottom with Baetis nymph patterns. Nymphs start drifting down the river and swimming to the surface in the late morning. Some nymphs might make several attempts to reach the surface before they actually succeed.

These insects are very small and don't provide much food value unless they can be taken easily in a large quantity. The best places to fish are where riffles with small, graveled, weedy runs enter slow pools or slow back-eddies. The nymphs leave the bottom of the riffle and drive along the bottom for a distance. Then they attempt to swim to the surface were the water velocity slows down. When the nymphs reach the surface of the water, their wing pads break through the meniscus. They can hang there for several minutes as floating nymphs. As the skin splits down the back of the head and between the wing pads, the dun starts to emerge through this tear. At this point the insect can neither swim nor fly. It is completely helpless and a perfect target for trout. The hatching duns can collect in quieter flows in very large numbers. The trout know where these conditions regularly occur and also collect in large numbers. Feeding is usually slow and quiet. Look for snouts and fin tips. Some Baetis hatch before reaching the surface of the water. Watch for bulging trout that don't quite reach the surface. If you observe such activity and your dry fly or emerger isn't working, try trimming down a dry fly to fish it wet. Target individual fish with pin-point casting.

From: Stable Isotopes Resolve the Drift Paradox for Baetis Mayflies in an Arctic River

By: Anne E. Hershey, John Pastor, Bruce J. Peterson, and George W. Kling

The colonization cycle hypothesis states that stream ecosystems would become depleted of insects if flying adults did not compensate for drifting immatures. Using long-term drift and benthic abundance data, we show that a Baetis mayfly nymph population moves downstream during development in the Kuparuk River in arctic Alaska. Baetis relative benthic abundance decreased from early to late season in an upstream unfertilized river section, while simultaneously increasing in the downstream fertilized section. Baetis nymphs drifted significantly more in the upstream unfertilized section, compared to the downstream fertilized section where food was more abundant. Approximately one-third to one-half of the nymph population drifted at least 2.1 km downstream during the arctic summer.

A stable isotope tracer experiment and mathematical models show that about one-third to one-half of the adult Baetis population flew 1.6-1.9 km upstream from where they emerged. These results provide a quantitative test of the colonization cycle for the dominant grazer/collector in the Kuparuk River. Quantifying the colonization cycle is essential to understanding stream ecosystem function because offspring of downstream insects are needed for nutrient cycling and carbon processing upstream. Since downstream drift and upstream flight are important components in recovery of streams from disturbances, our results provide a quantitative method for predicting re-colonization rates from downstream, essential to estimating recovery.