It took me many trips to get my 1st yote and that was with a mouth call in 1976 or 77. I've heard or read that a coyote is like the only critter that can identify a motionless man, sitting or standing. In daylight, I always back up into the brush to break up my outline and so that my gun barrel is not the only thing sticking out/up. I bought a book called Professional Predator Calling by Ed Sceery many years ago. Some of the best money I ever spent on yote hunting.
Every single movement you make on the stand must be very very slow. The electronic call does get the focus off of you but it does not make them blind. If you scratch your nose, they will see it. If you rotate your head quick because you heard something, they will see it. If you do not have a decoy, I would strongly recommend one. This one would do
https://mojooutdoors.com/product/mojo-fuzzy-critter/category_pathway-43
They focus on that movement and get careless. Giving you a few seconds to
slowly get behind the scope and get on them.
Primos made a product called Decoy Heart which was simply a ball with batteries and a motor inside. The motor was weighted and would cause movement. I made a stuffed rabbit, shoved a decoy heart into it and it worked. And I was still using mouth calls at the time. But it got their attention and focus off of where the sound was coming from(me). You can even shove a decoy heart into a brown sock and run a nail through the sock into the ground. It will just bounce and roll around.
Hide and remain motionless as if someone is out in front of you trying to spot you, because they are. Blend in with your immediate surroundings. One movement that catches their eyes can cause them to turn inside out and leave through their butt hole and you'll never even know they were there.
One more thought and I'll shut up. Don't just look for a coyote, look for a piece of a coyote. A black wet nose in the brush, an eye, a tail, a leg moving through brush or grass.
Keep trying, you'll win !
