Operation Noah
As seen on Australian Story, The ABC's Kirsten Drysdale is the granddaughter of Operation Noah's Rupert Fothergill, which rescued thousands of animals when the Zambezi River was dammed, in then Rhodesia (actually originally Southern Rhodesia) now Zimbabwe.
"A few buffalos had been removed before the starvation crisis reached its peak. Rupert's team...removed five adults. Then they ran out of drugs for the darting equipment and there was no response from Salisbury as to when new supplies would be arriving. So Rupert went after the buffalos with the Land Rover. In the gloom of the dust pall, amidst the snorting, lumbering, desperate animals, they looked for targets. As the younger animals slowed and dropped behind, the men would race from the vehicle and, bare handed, through force of numbers and in desperation at the plight of the game, wrestle the buffalo to the ground. Then the creature would be trussed up and carried to the raft. More often than not the bellows of the calves would bring angry mothers charging back and a free-for-all would ensue." From Keith Meadows' book "Rupert Fothergill Bridging A Conservation Era" showing a Land Rover was involved.

