Can you identify these hat feathers?

This is a stunning hat covered with gray iridescent feathers. Some are long and some are shorts and layered. Do you know what kind of feathers these are?

Thank you!

 

Can you show a close up of both types of feathers? The shorter ones look to be coque feathers, from a rooster; either an Asian variety or what is called a Spanish rooster. Hard to tell on the others unless I can get a closer look. Possibly "burnt" chamically treated ostrich, rhea, or vulture.

 

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Yes, a quite unique treatment on those feathers makes this a wonderful hat! They are indeed coque/rooster feathers, likely from the sides or tail of the bird. What is so interesting is that the milliner has cut and trimmed the feathers to a short choppy length and then overlaid them in a sort of mosaic or tiled roof technique. Really nice.

I am still not 100% sure what the other feathers are are when treated they can look similar. I could tell if I felt them. My best guess is a treated rhea feather, as they are more spiky looking than most burnt ostrich.

 

These may be better pics...

Thank you!