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Carrying is in the list. So is bartering.

The verbs are the scope

Possess, offer for sale, sell, offer to barter, barter, offer to purchase, purchase, deliver for shipment, ship, export, import, transport, carry. Almost every way a fly moves is named.

Which catches the hobby as well as the trade

Swapping flies with another tyer is bartering. Posting a box to a friend is shipping. Taking them on a trip is carrying.

Commercial tyers are squarely in it

Selling flies is the most obvious of the listed acts, and a tyer selling through a shop or online is doing several of them at once.

And material suppliers too

Offering for sale and purchasing are both listed. A shop selling feather is inside the same sentence as the tyer buying it.

The clause about products is what makes this different

A finished fly is not a bird and not obviously a part. It is reached as a "product, whether or not manufactured, which consists, or is composed in whole or part" of one.

Whether or not manufactured

Four words that close the gap somebody would otherwise argue. Working the feather into something else does not take it outside the Act.

Unless permitted by regulation

The prohibition opens with that qualifier, and permits exist for specified purposes. Whether any applies to a given situation is a question for the Fish and Wildlife Service rather than for this page.

Inherited material is the hard case

Old tying collections contain feathers from an era with different norms. Possession is in the list of prohibited acts, which is why this comes up and why it needs real advice rather than a catalog page.

This property does not give that advice

It names the clause and the species list and stops. Guessing at which feather in an inherited cape is lawful would be exactly the kind of invented answer this catalog avoids.

For new material the answer is simpler

Buy from suppliers selling domesticated poultry bred for tying, which is what the trade overwhelmingly is. That is the next section.

References

16 U.S.C. 703(a), the Migratory Bird Treaty Act. Unless permitted by regulation, "it shall be unlawful at any time, by any means or in any manner, to pursue, hunt, take, capture, kill, attempt to take, capture, or kill, possess, offer for sale, sell, offer to barter, barter, offer to purchase, purchase, deliver for shipment, ship, export, import, cause to be shipped, exported, or imported, deliver for transportation, transport or cause to be transported, carry or cause to be carried, or receive for shipment, transportation, carriage, or export, any migratory bird, any part, nest, or egg of any such bird, or any product, whether or not manufactured, which consists, or is composed in whole or part, of any such bird or any part, nest, or egg thereof" as specified in four bilateral treaties. law.cornell.edu
50 CFR 10.13, the List of Migratory Birds. Its stated purpose is "to inform the public of the species protected by regulations that enforce the terms of the MBTA". Species are listed in two formats, alphabetically and taxonomically, with taxonomy and nomenclature following the American Ornithological Society Checklist of North American Birds, and supplementary reference to the Clements Checklist for species the primary source does not cover. law.cornell.edu
Written from 16 U.S.C. 703(a) and 50 CFR 10.13, and from the catalog as it stood on 19 October 2026. This property does not say which species are on the protected list, because that is a lookup against 50 CFR 10.13 rather than something to assert from memory. CITES, the Endangered Species Act and the Lacey Act can each reach exotic tying materials independently and none of them is read here.