To access food sources or defend the territory,agonistic behavior,mostly in a form of ritualization,was frequently displayed. 为获得食物和保卫领域，黑颈鹤之间(或与灰鹤之间)常发生争斗，争斗的主要形式是仪式化威胁。
Ritualization is a behavior that occurs typically in a member of a given species in a highly stereotyped fashion and independent of any direct physiological significance.
Ritualization is also associated with the work of Catherine Bell. Bell, drawing on the Practice Theory of Pierre Bourdieu, has taken a less functional view of ritual with her elaboration of ritualization.