Dr. Jordan's idea of painting eyes onto cattle rumps came about after two lionesses were killed near the village in Botswana where he was based.
While watching a lion hunt an impala, he noticed something interesting: Lions are ambush hunters, so they creep up on their prey, get close and jump on them unseen. But in this case, the impala noticed the lion, and when the lion realised it had been spotted, it gave up on the hunt, Dr. Jordan says.