There is, for example, only one male for every 100 females in the Periyar Tiger Reserve of south India.

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On the drive in or out, stop at Periyar National Park and trek through the jungle on an elephant.

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Though the snakes here are metaphorical, there are plenty of animals to spot in the jungles of the vast Periyar Wildlife Sanctuary, including monkeys, tigers and about 1, 000 elephants.

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Tamil Nadu is involved in a spat with Kerala over the Mullaperiyar dam on the Periyar river and says some scenes in the film depict related "issues".

BBC: Official poster of Dam999

Tamil Nadu was involved in a spat with Kerala over the Mullaperiyar dam on the Periyar river and said some scenes in the film, Dam999, depicted related "issues".

BBC: India's Tamil Nadu suspends Kamal Haasan's Vishwaroopam