We have a family of (brown) foxes living in the woods behind our house. They mostly stay out of our yard because our dog is significantly bigger than they are and they don't realize what a pathetic coward she is. However, their needless fear of her does not stop them from taunting her as often as possible; they have a very good idea of where she can and cannot go.
Now, we have an outdoor cat, and we feed him canned food that we set out a little off the front porch whenever he yowls to be fed. Now, the dog adores the cat-food, which smells terrible and is irresistible to her; whenever she is off the leash in the front yard she will sprint to the front porch to lick any empty can clean of residual stinky gunk.
The foxes love the cat-food as well, and late at night they will come into the front yard and look to see if there is an empty can there that we haven't yet cleaned up. There's never any significant amount of food left in the can, but like the dog, the foxes just want to lick it clean.
The thing is, the foxes move the empty can off the porch and about eight feet out into the grass... exactly right in front of the front window where the dog stands her sleepy sentinel each night. They'll then yip to wake up the dog before settling in to lick the can while she goes crazy, barking and batting at the window with her paws and incidentally rousing me out of bed.