There are two great products that the native Hawaiians made out of feathers. One was capes made out of feathers and netting. And the second was the feather Lei which is the necklaces that you always see made out of flowers.
This feather cape is called a `Ahu`ula
This feather cape even though it looks the same is called by a different name. this feather cape is called a Ahuli`i.
This feather cape is made out of feathers from the Pueo bird which is actually a Hawaiian short-eared owl.
Here is a picture of a 18th century feather Lei.