Original sentence: , but they are also bold enough to feed alongside lions, and may force the lions off a kill.Lion predation can account for up to 71% of hyena deaths in Etosha.On the other hand, in Northern Botswana's Chobe National Park, the situation is reversed: hyenas frequently challenge lions and steal their kills: they obtain food from 63% of all lion kills.The two species may attack one another even when there is no food involved for no apparent reason.When confronted on a kill by lions, spotted hyenas may either leave or wait patiently at a distance of  until the lions have finished
Edited sentence: Hans Kruuk, who found that lions repeatedly approached him whenever he played the tape-recorded calls of hyenas feeding.In some cases, spotted hyenas are bold enough to feed alongside lions, and may occasionally force the lions off a kill.Lions are quick to follow the calls of hyenas feeding, a fact that was proven by Dr.Lions may charge at hyenas and maul them for no apparent reason: one male lion was filmed killing two matriarch hyenas on separate occasions without eating them, and lion predation can account for up to 71% of hyena deaths in Etosha.The two species may act aggressively toward one another even when there is no food involved.When confronted on a kill by lions, spotted hyenas will either leave or wait patiently at a distance of  until the lions have finished