The Coyote Breeding Season
Here in the Midwest, coyotes breed from January through March, with the last week of January, up until about St. Patrick's Day being prime time. That's March 17th for you unfortunates of non-Irish descent.
Many coyote hunters, this one included, usually experience the best hunting of the winter during the coyote breeding season. There are a number of reasons for this. Increased daytime movement is the biggie. This is the time of year when it is not uncommon to catch a lone male, or often a pair of coyotes, moving across a section in broad daylight. The lone males are likely young males out searching for their first encounter with the females of the species. Since they have no idea what they are doing or how to go about this mating game, they have to do a lot of traveling while searching for a receptive female. One tracking study found some young males traveling 100 miles or more before settling down. A coyote can get into a lot of trouble traveling distances like that, trouble like ending up in the crosshairs of your scope, for instance.
Pairs are most often mature males and females, which have gotten together each winter about this time for many years. Some males are faithful partners, sticking with the same female not only through the breeding season, but helping to raise the pups as well. But some males and even some of the females, tend to stray now and then. This explains why some females have litters, which have two and sometimes three different fathers.