The only thing I have seen spook a coyote is movement and wind change, rifle color or scope color ain't going to scare a coyote. Rio7
Glare likely isn't as big an issue in brushy country. The coyote s often don't see you from a long distance. When I lived in Arizona and called the brush I didn't worry about glare. As you stated .movement was much more the issue. In the more open country of montana, you can see the coyote s at a distance. And they can see you. Glare off of your call or barrel, or whatever becomes more of an issue. One way to mitigate it is to simply sit in the shade. I sat in the shade of a decent sized rock while calling this morning. I make it a habit.
