The six-part series 'Mammals' will air this Sunday at 19:00 GMT
That's one of the never-before-captured behaviours in Sir David Attenborough's latest series - Mammals.
'Mammals' is a challenging series to watch but also shows the incredible ingenuity of the world's most successful animals.
In the final episode of the six-part series Sir David says: "If we make the right decisions we can safeguard the future not just for our fellow mammals but for all life on Earth."
The series comes 20 years on from the original Life of Mammals series.
The opening episode of the series has been shot completely in the dark - revealing how an African leopard uses its specially adapted eyesight to prey on sleeping monkeys.
"The thermal cameras now are stunning, the detail you can see. You can see the fur, you can see the whiskers of animals, so that technology has opened up that whole new world to us," Scott Alexander, series producer, explained.
Assistant Professor John Whitman, from Old Dominion University and chief research scientist for Polar Bears International, who provided advice on the series said it: "Illustrates the flexibility that polar bears try to have to replace the loss of opportunities to hunt marine, mammal prey."
"Today almost half of the world's habitable land is being used for agriculture. Across Southeast Asia vast palm oil plantations are replacing once pristine forests," Attenborough warns us in episode two, 'The New Wild'.The destruction of the forests means there are dwindling food sources for local wildlife like pig-tailed macaques.
Whilst fitting transmitters on the animals for the series they were heard making sounds to each other underground - a phenomenon only heard once before and not captured on tape.
Howler monkeys are at constant risk of electrocution as they navigate the power lines in Costa Rica.The series returns to some of the mammals filmed in the original series to see how human interventions are helping them to survive.