I heard this Coyote barking before I even saw it. I believe it is a female and I think she was warning her mate that I was in the area.
The first photo shows her barking and how well she blends in with her surrounding. The second photo is when the male arrived and they posed for me before retreating into the corn stalks.
The calls a coyote makes are high-pitched and variously described as howls, yips, yelps, and barks. These calls may be a long rising and falling note (a howl) or a series of short notes (yips). These calls are most often heard at dusk or night, but may sometimes be heard in the day, even in the middle of the day. Although these calls are made throughout the year, they are most common during the spring mating season and in the fall when the pups leave their families to establish new territories. When a coyote calls its pack together, it howls at one high note. When the pack is together, it howls higher and higher, and then it will yip and yelp and also do a yi-yi sound, very shrill, with the howl.