Feileadh Mor tartan as camouflage?

[FossilHunter]

I am not sure when the boffins came up with the information that deer cannot see red/orange, but as far as I am aware its a fairly recent discovery. I am pretty sure it was not general knowledge two/three hundred years ago, so it was an obvious thought by those deer stalking and so on, to blend into the countryside and of course breaking up the silhouette was part of that thought process.

Thankfully our shooting sports are run in a different way in the UK and we do not encourage todays sportsmen to wear red or orange, actually its actively discouraged. In fact I was grouse shooting in a glen the other day where the game keepers were having seizures over a couple of visiting guns(shooters) wearing green! Green, particularly dark green and black are unusual colours on a grouse moor at this time of year and a combination of standing out, even in a grouse butt and movement would steer the grouse elsewhere.

While deer, and most mammals other than primates, have poor color perception, birds have exceptional color perception, including part of the UV spectrum invisible to humans. You have pointed out before that highlanders tend to not own a huge number of outfits for a given task so I imagine that a tweed or tartan garment for hunting that works well for both grouse (which can see color well) and deer (which do not) would be ideal.