Walt Mueller, Jr., aka "The Otter" (always in the water and usually catching fish), has been an avid fly tier and fisherman for over 60 years and resides in the foothills of the Colorado Rockies. Walt has the distinction of developing and marketing the original "Soft Milking Egg"® fly patterns to the industry since 2002.

While he initially developed these realistic and deadly milking egg patterns for the Great Lakes steelhead areas that he fishes, they have also proven to be exceptional flies for all the cold water fish species, from all European countries, Russia, New Zealand, Australia, Alaska, all the Canadian provinces, South Africa, Japan, and the entire USA mainland. His egg patterns are recognized worldwide, and are "Second to None." His new "Embryo Egg"©, with an internal bead inside the egg near the outside of the egg skin and not on the hook shank, are devastatingly realistic and no other egg pattern in the world comes close to this new design! Also, his new "Globule Soft Sucker Spawn"© pattern is now being widely used, not only for steelhead, but for trout fishing worldwide in all our rivers and streams.

Soft Milking Egg� fly pattern in action

Seven different sizes of Otter's "Soft Milking Egg"® fly patterns are available, from the small 2 x 2 mm double row Otter's "Soft Sucker Spawn"© OS-3 flies tied from tiny #18 to #8 hooks, to the 4 mm, 6 mm, new 8 mm and 10 mm flies with single eggs on #8 thru #16 hooks; plus the larger 3 x 6 mm clusters and multiple clusters on #8 up to #2/0 hooks, all in 17 different translucent and opaque egg colors.

Soft Milking Egg� storage
Soft Milking Egg� new color
Soft Milking Egg� in Alaska
Soft Milking Egg� in Michigan
Soft Milking Egg� in Australia
Soft Milking Egg� products in a variety of colors

For more information, contact:
Montana Fly Company

For info on where to order our materials and flies, contact us by email.

All "Soft Milking Egg"® patterns are registered trademarks of Blue River Designs, LLC.
© 2017 Blue River Designs, LLC
All rights reserved.
Note: We do not sell bulk eggs to tiers. Our products are for individuals' personal tying and use and are not for tiers to resell in wholesale or retail markets. Anyone not authorized, in writing, to copy and reproduce our USPTO trademarked and registered patterns are in violation of trademark laws and are subject to legal action on our behalf.


Click links below to read about our newest products, endorsements, & fly tying tips/tricks:

Pegging "Otter Eggs" With Only a Leader! (click here)

Recent Endorsement from Montana Fish Man Outfitting! (Click here)

Pegging Kit


Otter's Selective Trout "Tail Water" Combo Kit including both tiny 3 mm single eggs and the popular 2 x 2 mm "Soft Sucker Spawn"© to tie up his new "Globule Soft Sucker Spawn"© pattern with hooks and Milking Veil material. NOW AVAILABLE AT OUR ONLINE STORE! (Combo Kit #6)

Select your kit for tying Otter's "Soft Milking Embryo Egg"© patterns in 4 mm, 6 mm, 8 mm, or 10 mm sizes -kit includes needles, veil, hooks, eggs and beads- everything to tie up these deadly patterns! NOW AVAILABLE AT OUR ONLINE STORE -- GET YOURS TODAY!

Bead Threaders

And after numerous customer requests, we now sell extra small bead threaders that can store both the tiny 10/0 and 13/0 beads for use with our 6 mm and 4 mm eggs so you can "peg" them to form the deadly Otter's "Embryo Egg"© on your leader.


Our ONLINE STORE makes it easier than ever to stock up on all of The Otter's great products. In addition to our Retail Materials and Tied Flies, you can buy Hooks, Embryo Egg Glass Beads, Otter's "Egg Pegging Box"©, our special Starter Combo Kits, and other accessories! Click here to shop in our ONLINE STORE NOW!

Order Soft Milking Egg� products

Pay with major Credit Cards

Our Brochure is available in PDF format and should load in your web browser. To download, "right click" the link and choose "Save target as." You can view and print PDF files with Adobe� Acrobat Reader, a FREE download at:

Download the Soft Milking Egg� product catalog

Download our "Notes" on Using Otter Egg Materials, a list of helpful product-related tips and information. "Right click" and choose "Save target as" to save and open it on your hard drive.