Tyrannosauri reges

— This is because “histological examination of bone in coprolites can give the approximate stage of life of the consumed animal” and thus show whether Tyrannosauri reges tended to prey on the youngest and oldest (hence most vulnerable) members of herds or instead to scavenge on carrion of all ages, gregarious or not (cf. the more accessible discussion in Erickson 1999: 49).