another strange request

I'm looking for various bird feathers, colorful or with a bit of a prism effect shine to them (you know, they look like they're colorful in the light but look about black or whatever without light) I'd love to trade seeds for them or whatever :)
would love to have some really fluffy ones too. Ostrich feather would be the ultimate :)

Oh and butterfly wings too if you find one that perhaps died and the wings are still good (just don't kill any for this) :)