Just to chime in with an echo, do take care to check local laws.
There are also laws with exceptions... for example, I cannot sell Wolf fur here in California, but I can own legally harvested fur and tails (which I hang on the NA drums I make). There are stricter laws, for example, that do not allow me to possess an eagle feather... or to even joke about it

. LOL. J/K... but registered members of any NA tribe are exempt.
Crow feathers, at least in my neck of the hundred acre wood, are pretty common. I am awakened by them, and they sometimes leave offereings of feathers at my door. Similarily with the local forests, but that might not hold true elseware.
If you have any doubts, contact the Dept of Fish and Game for direction.
I hook my eagle feathers...er, um, turkey feathers painted to look like eagle feathers

on my flutes using the crimp cones, available at most hobby and leather stores. Basically its a cone shaped metal devise that slips on a leather thong and allows you to, much like using a bead, slip the shaft of the feather into it. Unlike a bead (which holds just as well, in my opinion) with this you can crimp it for solid contact.
Cryss