Avaram, it is definitely a no no to even possess them, unless you have some sort of tribal paper saying how and why you have them. Better check with your local game commission first, then if you can possess them, check with the raptor groups, or road kills.
But there are so many other types of feathers out there to use. Even chicken feathers, crow, raven, but I am not sure if you can possess raven feathers either. Like I said, check with your local game commission, but most any feather should be fine. Some are just better than others, but use what you have. Know anyone with peacocks? the wing feathers are great. Owl feathers are softer, so maybe they would be quieter......stealth arrow......
Wayne.