From featherbuyers.com website...I've given numerous fly tying guys duck feathers..my wife has used them on her hand tied jigs as well

Legally Harvested Waterfowl
I buy only plucked feathers, no skins or whole birds. Before you call to tell me you can’t sell feathers from wild ducks, please take a look at Migratory Bird Treaty Act. The law that makes buying and selling feathers legal is 50 CFR 20.91. Click to see the whole reading. However, some states have laws that are more restrictive and I’m putting together a list of those states.