Gibraltar warning: Why Winston Churchill insisted monkeys must NEVER leave the Rock

These days, the population is estimated to be rather higher – roughly 200 – and speaking on the Rock, close to the cable car which carries legions of tourists on an hourly basis, Dr Sawchuk said this was partly thanks to the efforts of the wartime leader.

Dr Sawchuk, a biological anthropologist at the University of Toronto in Canada, told “The macaques, also known as Macaca sylvanus, rock apes, or Gibraltar macaques, are a very special group.

“It’s probably the only group in the world where you have documentation that spans three centuries.

“As you can imagine, they’ve been here since the British took Gibraltar in 1704. And it’s a remarkable legacy.”

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