David -- This is a link to one of the better coyote huntin sites on the www.
There is a page that has calls on it, you can hear what they sound like.
This is what works for me.
I like to call in an area that has good cover, for mice.
Cut corn fields that are next too weed fields are good.
Any field or pasture that has knee high weeds has a good population of mice and rabbits.
When I set up to start callin, I try to make it difficult for a coyote or fox to work down wind of me. Ditches and fence rows can help you out on trying to keep them down wind. (sometimes)
I start my calling softly at first and increase the sound a little at the end and stop it dead.
Remember -- You are a rabbit that just got caught by a predator and you don't like it at all, make the sound quiver and go up and down, put some feeling into it, talk to that yote.
When you put a light on that yote don't put the brightest part of it in his eyes, use the edge of the light, Just enough so that you can see him. I use an amber light, but never put the center of it in his face. My rifle and shotgun have a red lights on them.
David --If you are seeing a lot of birds of pray(hawks, Owls) working a field during the day, you can bet that the Fox and Coyotes are working that same field at night.
Good luck ---- Oh, yea. Almost forgot-- one more thing. Dog's will come to the call.