The coyote population in Iowa is much lower than any other state that I've hunted, but there are definately coyotes in pockets. When I first moved here from Illinois, six years ago, I would have sworn there were no coyotes. I shot 13 red fox my first winter, but never spotted a single coyote. My second season, I found 3 coyotes. It took me a few seasons to figure out what was going on. After talking with the DNR and local trappers, I found that there has been and continues to be a magic line on Highway 30, in my area. I had been concentrating North of that line and finding mainly fox and barely any coyote sign. I've focussed my efforts and secured permission to land South of the line, in the past 3 seasons....and I'm calling alot more coyotes. Now, there is no "magic" about the "magic line". It really has to do with terrain change.
Bare in mind, I was born and raised in Illinois, which had the exact same 1 mile gridlock and flat field terrain. I used to kill over 100 coyotes per season, but mostly because I was a dog hunter and raised greyhounds for catching, and called on the side. I still spot 8-10 coyotes per morning, when I go back home to visit. So moving to a similar terrain, with totally different results and population was frustrating. I still haven't figured that part out, when it comes to the flat field areas of much of Iowa. Two seasons ago, I drove to South Dakota to speak at a calling seminar. There was 6" of snow and 10 degree weather, for the entire drive. I stuck to the major interstates for the 7 hour drive there, and drove a cross country route on smaller roads (including country roads) for the way home, with gun in tote. In 14 hours of driving....I spotted ZERO coyotes. I'm still trying to figure out the flat land areas.
For the past few years, I've focussed near the Cedar and Iowa river bottoms and the hilly country around them. I've found the coyote concentration to much, much larger than the areas I was calling in my first few years in Iowa. I also focus on odd sized sections of land. The 2x3 mile sections or such. If you can find sections that have chunks of timber or thick draws, drive the sections and look for sign on likely crossing areas.
Tony