If you're like me, until this very minute you thought that when wolves traveled on foot, as it were, they just got in a line and wandered from place to place. And now I can share what I just read: there is a hierarchy in the line. All wolf pack lines are single-gender and all are led by either the alpha male or the alpha female of the gang. Along the way the older and sick wolves are in the middle, and they are protected by abler animals. The last guy or gal in the line is the "omega" wolf, the schlemiel of the group, who gets picked on and does not associate socially with the others. If you can understand how this works, you may now offer socializing advice to people in middle school.
I've seen this photo done before and it never fails to make me smile. Just get a camera with a timer setting, set it for "winter, spring, summer and fall" and come back later for a really cool shot!