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Polly Rosborough’s Fledermouse

Polly Rosborough's Fledermouse

Fountains of Youth – Classic trout flies that have withstood the test of time … flies that remain “forever young”

by Rusty Dunn

The path to greatness in fly fishing is quite sim­ple.  A tried and true formula transformed the an­gling un­knowns of Skues, Sawyer, Gordon, Leisen­ring, and Marinaro into fly fishing legends.  If you as­pire to great­ness, you too can follow the plan.  First, put down this col­umn and read no further.  Disbe­lieve all fish­ing ad­vice of­fered by friends and family.  Doubt everything you read or hear, no matter how cele­brated the source.  Be espe­cially wary of ‘experts’.  G.E.M. Skues per­haps said it best in 1921:

An authority is a per­son engaged in the invidious business of stereo­typing and disseminating infor­mation, frequently incorrect.  Angling literature teems with examples.”

Learn instead from your own observations and ex­peri­ences.  Your education will take longer than a quick read of some book, but you’ll de­velop a deep un­der­standing of the founda­tions of fly fishing.  Take time each angling day to sample and identify pre­vailing in­sects.  Quietly watch how trout re­spond to them.  Col­lect samples, take them home, and tie flies to match.  Then, fish the flies in ways that mim­ic behav­ior of the naturals.  If any meet with suc­cess, vary the patterns little by little and fish them again.  And again.  And again.  With­hold judg­ments and opinions until you’ve tested your ideas over and over.  Many thou­sands of an­gling tech­niques are de­scribed in the lit­era­ture, but you need only two – ob­servation and experi­menta­tion – to be a world class angler.  Ignore the pun­dits but listen to the trout, as they will teach you how to be great.

E.H. “Polly” Rosborough (1902-1997) was a self-taught angler who pioneered flies and methods of fish­ing the American West decades before it was fashion­able to do so.  He lived in Chilo­quin, Oregon and pri­marily fished rivers west of the continental di­vide.  Ros­borough was a hunter, trapper, and out­doorsman whose only instructional guides were a couple of an­gling sup­ply cata­logs.  Untainted by the opin­ions of oth­ers, Ros­bor­ough started from scratch.  He stud­ied riv­ers, insects, and trout and experi­mented with meth­ods of fly fish­ing.  He taught him­self fly tying, be­cause lo­cal stores sold nothing that matched the in­sects he col­lected.  Ros­bor­ough’s most famous flies are his two dozen “fuzzy nymphs”, so named because their in­dis­tinct fuzzy bodies are tied of soft ani­mal fur.  He cre­ated with fur the se­ductive un­derwater move­ment of mate­ri­als that two centuries of soft-hackled wet flies achieved with feath­ers.

Rosbor­ough studied western rivers big and small, and in time be­came one of the coun­try’s most knowl­edge­a­ble and successful an­glers.  In 1965 he condensed dec­ades of fly fish­ing in­sight into a humble 88-page mas­ter­piece entitled Ty­ing and Fish­ing the Fuzzy Nymphs.  The book is one of the most original in all of an­gling.  Fuzzy nymphs are stout flies de­signed for stout fish.  They are big, furry, durable, and very effec­tive.  The Fle­der­mouse is one of Rosborough’s finest crea­tions.  He once stated that, if forced to choose a single fly for fishing at all times under all con­ditions, he would opt for a size #8 Fled­ermouse, which he viewed “as near all-purpose as it would be possible to de­viseIts hazy out­line cons the fish into thinking it might be any of a num­ber of nymphs.”

A relative lack of exposure by the popular angling press limited Rosborough’s national recognition until late in life.  Among co­gnoscenti, however, he was ac­know­l­edged early on as one of fly fishing’s most origi­nal and crea­tive tal­ents.  Rosborough never stopped tinkering with fly patterns, and he advised fly tyers to “never feel that you have tied a fly that is good enough.  You never will.  Al­ways try to tie the next one better.”

Polly Rosbor­ough could inspire you to great­ness.  But remember, be skepti­cal of his maxims until you’ve con­firmed them for your­self … over and over again.

Copyright 2019, Rusty Dunn


Polly Rosborough’s Fledermouse

Polly Rosborough's Fledermouse

Polly Rosborough nymphs have slim bodies and a, clean prominent head of thread behind the hook eye.

Hook: 3XL heavy-wire nymph hook, #2 – #16
Thread: Golden brown or tan
Body: Muskrat, mink, and rabbit fur (2:1:2), blended light grays and browns; rough­en the body with a brush to be fuzzy
Collar: Muskrat belly fur, length ~1/3 of the hook shank
Wings: Barred teal or mallard flank topped with brown widgeon, length ~1/2 hook shan
Head: Tying thread; long, tapered, and coated twice with clear cement.