对应1楼，这是07年的研究报告：The death roll is a feeding behavior that depends on water buoyancy to support body weight and reduce friction during rotation. On land, without buoyancy, the crocodilian must support its mass on limbs, leading to reduced rotational efficiency, increased energy expenditure, and limited endurance.

没想到陆地上最灵活的大鳄是咸水鳄

狮子少一条腿，还对战斗力没有太大影响

鳄吹的想像是很美好

可是在iucn的研究报告中明确表示鳄鱼在陆地上没法剧烈运动

此外，在《Crocodiles: Inside and Out》（Webb & Manolis, 2000）中，写到：Crocodilians are semi-aquatic ambush predators, and their morphology and physiology are highly adapted to life in and around water. On land, they are slow, cumbersome, and lack the stamina to engage in prolonged chases or fights. This makes them vulnerable to predation by large terrestrial carnivores when away from the safety of water.”

在BBC中：“While crocodiles are apex predators in the water, their dominance does not extend to land. On dry ground, they are slow and lack the agility to compete with big cats like lions and tigers, which can easily target their vulnerable neck and eyes.”

总结：鳄鱼也就在水里还行，在陆地上别碰瓷狮虎等大型猫科动物

明确表示鳄鱼的身体构造不适于陆地。
来自IUCN鳄类专家组（CSG）官网“Locomotion”页面的原文
“The organ of propulsion for crocodilians is their tail, for swimming. The limbs are relatively small. The forelimbs have five digits, the hindlimbs four. The legs are held close to the body when moving on land, which gives them a high centre of gravity and makes them unstable and clumsy when turning. This is why crocodilians are not efficient runners on land, and are easily outmanoeuvred by more agile predators.”
（译文：鳄鱼的推进器官是用于游泳的尾巴，四肢相对较小。前肢有五趾，后肢有四趾。在陆地上移动时，它们的腿紧贴身体，这导致重心很高，转弯时不稳定且笨拙。这就是为什么鳄鱼在陆地上不是高效的奔跑者，很容易被更敏捷的捕食者超越。）

好东西。