Yes, for the large part, there is a pragmatism to why and what they kill. But, there are times when its territorial and not always necessary for survival - more than one pride can live together, or a male adult is not obligated to kill all the offspring of the former leader.
Either way, it's indiscriminate in the fact that a moral aspect is not considered in their actions, they will never hesitate to kill, irrespective of the objective, due to their conscience impeding them.
Interesting, that the notion of whether or not evil actually exists, is just a relatively recent controversy? If so, at least the atheists are complying with their own logic - if no God, no moral standard.
But, ultimately, as it is written, '...the fool says in his heart that there is no God...'