Ten Deadliest Snakes with Nigel Marven

In the tunnels of a leafcutter ant nest, we uncover a Central American coral snake sharing the burrow. Nigel meets a rattlesnake without a rattle, and a young Mexican cantil uses its white tail tip to attract prey close for a deadly strike.

Infra-red cameras in the dead of night reveals a forest pit-viper sense and strike a target just fractionally warmer than its surroundings. Then there's the mussurana - a snake that not only eats other snakes but is immune to their venom.

Nigel comes face-to-face with the Philippine cobra, the most lethally venomous cobra on the planet. And in deep, dark caves on Palawan Island, the presenter searches for giant reticulated pythons sheltering from the heat of the day.