I set up my camera again at another den site.  There were obvious canine prints at and about the entrance but they appeared to be too small for coyote.  

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Instead, a Red Fox appeared (Vulpes vulpes).  Coyote seldom tolerate a fox nearby so I suspect the prints I see along the hedgerow behind Wrigley Corners are also Fox and that the Coyote I heard here last year are gone.  I will try another spot I suspect may have Coyote but so far they have been more elusive than I first imagined.