It sounds silly, but the Migratory Bird Treaty that prohibits feather collection is protecting birds and saving lives.
FEATHERS AND THE LAW: UNDERSTANDING WHY COLLECTING FEATHERS IS
Collecting bird feathers in the United States – legality and
Ocean Wave Flame with Ash - Memorial Glass & Jewelry
Five Things to Know About the Recently Changed Migratory Bird Act
Why collecting bird feathers could cost you $15,000 fine
I have a small feather collection and my friend sent me this photo
For The Birds – Oklahoma Living Magazine
In search of Syria's pigeon smugglers - BBC News
May-June 2012 - National Zoo