The coyote began tunneling under the fence, but then backed up and stood up high to check if the coast was clear on all fronts. It was, so he then slithered effortlessly through the six inch opening under the fence: head down, through the opening on his belly, and up again on the other side, bending as agilely as a snake. He was obviously not in a hurry, not going anywhere in particular it seems, because he lingered on the other side of fence where he poked around for a while before casually trotting on.