Looks like a family kerfuffle. According to those who should know the cranes generally hang out in groups of three on this direction of travel. one male, one female and their yearling offspring. this looked like a vigorous family discussion to us.. the orange/golden light just before sunrise made for some wonderful colors on these more or less grey birds. well,.. grey except for the startlingly red area on their heads.
From Crane Festival 2011 Monte Vista CO