I bought a hen pheasant skin at the Sportsmans Warehouse for about 9 bucks. There are enough feathers on it to tie more flies than most folks will ever use. In addition Jeff Hams mentioned feathers off of ducks. Yesterday I tied a couple of flies from a hen Shoveler that got too close to me. There is enough feathers on one duck to last a long time. Here is a link on the subject: http://www.peninsulaflyfishers.org/D...?pageId=875769
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Tim