latched onto the neck until its target dies of strangulation. By this method, gaurs and water buffaloes weighing over a ton have been killed by tigers weighing about a sixth as much. Although they can kill healthy adults, tigers often select the calves or infirm of very large species. Healthy adult prey of this type can be dangerous to tackle, as long, strong horns, legs and tusks are all potentially fatal to the tiger. No other extant land predator routinely takes on prey this large on its own. With small prey such as monkeys and hares, the tiger bites the nape, often breaking the spinal cord, piercing the windpipe, or severing the jugular vein or common carotid artery. Rarely, tigers have been observed to kill prey by swiping with their paws, which are powerful enough to smash the skulls of domestic cattle, and break the backs of sloth bears. After killing their prey, tigers sometimes drag it to conceal it in vegetation, grasping with their mouths at the site of the killing bite. This, too, can require great physical strength. In one case, after it had killed an adult gaur, a tiger was observed to drag the massive carcass over a distance of . When 13 men simultaneously tried to drag the same carcass later, they were unable to move it. An adult tiger can go for up to two weeks without eating, then gorge on of flesh at one time. In captivity, adult tigers are fed of meat a day. Enemies and competitors Tigers usually prefer to eat self-killed prey, but eat carrion in times of scarcity and also steal prey from other large carnivores. Although predators typically avoid one another, if a prize is under dispute or a serious competitor is encountered, displays of aggression are common. If these fail, the conflicts may turn violent; tigers may kill or even prey on competitors such as leopards, dholes, striped hyenas, wolves, bears, pythons, and mugger crocodiles on occasion. Crocodiles, bears, and large packs of dholes may win conflicts with tigers, and crocodiles and bears can even kill them. The considerably smaller leopard avoids competition from tigers by hunting at different times of the day and hunting different prey. In India's Nagarhole National Park, most prey selected by leopards were from against a preference for heavier prey by tigers. The average prey weight in the two respective big cats in