Years ago when I lived out in CO, I lived to hunt coyotes. I found that when it was calm and cold, a coyote would respond at any time of the day if they were present. But I do agree with early mornings and evenings being on the average the best times. I sure miss those days of calling them in right in your face. I would love to have the opportunity to do it again. I have lots of land that I could call in Eastern CO, just wish I had somebody that would like to make a road trip out there with me. It sure helps with expenses. I hunted around many of the cattle feedlots around Ft. Morgan, CO. My family also has around 2000 acres we run cattle on as well as all the farmers land surrounding our home place.