Feather bonnet age?

[Jags]

The plumes are actually called hackles and a usually made from vulture feathers by tradition. Most of the Highland regiments , Gordons, Argylls, Queens Own Highrs, RHF wore white hackles except for the BW with red. The military Band of the SCOTS wore red for a while, not sure if they still do, and the Scots Guards pipers wear red and blue. White has been the standard for years.

Found this image online. I'm sure I also read somewhere that the Seaforth pipes and drums wore red.