Quote Originally Posted by OC Richard View Post
To my mind "plume" conjures up a very different thing, like a big ostrich feather worn in a musketeer or pirate hat.

The Black Watch wore red hackles in their feather bonnets but also in their Tam O Shanters. The TOS hackles are of course much shorter.

I can't recall seeing any of the Scottish Highland regiments wearing hackles in their Glengarries.

Various regiments also wore hackles in their sun helmets.

With the formation of The Royal Regiment Of Scotland it became hackles in the TOS for all battalions:

1SCOTS black
2SCOTS white
3SCOTS red
4SCOTS blue
5SCOTS green
6SCOTS grey
7SCOTS purple

The pipers of the Cameron Highlanders wore eagle feathers in their Glens, while pipers of several regiments wore a blackcock's tail.
The Camerons/Queens Own Highlanders/Highlanders/ successively all wore the blue hackle on their glens. Cameronians wore black with certain orders of dress with both the glen and TOS. The RSDG pipes and drums wear white hackles with glens in certain orders of dress.