I'm not from AZ but I know that coyote scat content can vary considerably throughout the year. As different food sources become available, the coyote will utilize them till exhausted, then move on to the next easy meal.
For example, in my area, in the summer a lot of scat around here consists mostly of grasshoppers.
Little later the scat is mostly peach pits, blackberry seeds, apple seeds, water melon, cantaloupe and whatever other ripe fruit is available.
Fall comes and deer season starts, most of the scat will start turning to the usual black, tarry, hair filled stool we all know and love. /ubbthreads/images/graemlins/laugh.gif
Anyway, point being, the content of the scat changes. /ubbthreads/images/graemlins/laugh.gif
Later