"elephant boneyards"
A longtime legend has it that when elephants sense they are about to die, they leave the herd and trek alone to special places where elephants go to die. Accumulations of elephant bones have been found, but no one has actually followed a dying elephant to such a place; these boneyards might have been the result of a mass die-off of a herd due to disease, starvation, or poisonous gases from a volcanic vent (what are known in Swahili as mazukus).