Associated with aggressive interactions between wolves is a suite of ritualized agonistic displays that serve to curtail active aggression by signaling dominance and subordination. One famous exemplar of the latter is the ‘rollover’, whereby a subordinate animal rolls over onto its back, often spontaneously, in an act of ‘passive submission’ or appeasement that inhibits attack by the dominant one. This behavior is coupled with other distinct postures and behaviors, indicative of ritualization, that include flattened ears, curved spine, tucked tail, reduced mobility and averted gaze