Danny Green / Bengal tiger (Panthera tigris tigris) female, portrait. Bandhavgarh National Park, India, December.

Danny Green / Bengal tiger (Panthera tigris tigris) profile walking, looking for prey. Bandhavgarh National Park, India, December.

Danny Green / Bengal tiger (Panthera tigris tigris) resting on track. Bandhavgarh National Park, India, December.

Danny Green / Bengal tiger (Panthera tigris tigris) male resting in undergrowth, portrait. Bandhavgarh National Park, India, December.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male (T29) cooling off in a waterhole Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male (T29) cooling off in a waterhole Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male (T29) and resident female (T27) cooling off in a watering hole Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male (T29) and resident female (T27) cooling off in a waterhole Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) female (T27) acting cautiously as dominant male (T29) approaches watering hole Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) tigress (T32) feeding on Spotted deer / Chital (Axis axis) killed by her earlier that day while her young cub watches. Kanha National Park, Central India. Camera...

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male (T29) walking on mud dam wall. Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) sub adult tigress resting at dusk. Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) sub adult tigress resting at dusk. Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigirs) tigress, stopping due to sound from camera while patrolling, Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) (T27) walking on bund / dam wall trail. Kanha National Park, Central India. Camera trap image.

Yashpal Rathore / Bengal tiger (Panthera tigris tigris) dominant male approaching 'Beja pani' waterhole, Kanha National Park, Central India. Camera trap image.

Staffan Widstrand / Jungle cat (Felis chaus) at night, Kanha National Park and Tiger Reserve, Madhya Pradesh, India

Nayan Khanolkar / Bengal tiger (Panthera tigris tigris) in forest clearing. Camera trap image. Pench National Park, Madhya Pradesh, India. January 2018.

Yashpal Rathore / Indian pangolin (Manis crassicaudata) foraging for food, Kanha National Park, Madhya Pradesh, India.

Tony Heald / Bengal tiger (Panthera tigris tigris) walking, Bandhavgarh National Park, India.

Tony Heald / Asian elephant (Elephas maximus) mother and baby domesticated elephants in water, Bandhavgarh National Park, India. March.

Tony Heald / Hanuman langur (Semnopithecus entellus) baby next to mother, Bandhavgarh National Park, India.

Tony Heald / Hanuman langur (Semnopithecus entellus) eating coconut husk, Bandhavgarh National Park, India. March.

Andy Rouse / Bengal tiger (Panthera tigris tigris) portrait, whilst stalking, Bandhavgarh, India.

Espen Bergersen / Bengal tiger (Panthera tigris tigris) portrait, Bandhavgarh, India.

Espen Bergersen / Bengal tiger (Panthera tigris) baring teeth, Bandhavgarh, India.

Cyril Ruoso / Bengal tiger (Panthera tigris tigris) female resting under tree, Kanha National Park, India. Non-ex

Cyril Ruoso / Bengal tiger (Panthera tigris tigris) walking through grassland, Kanha National Park, India. Non-ex

Cyril Ruoso / Indian gaur (Bos gaurus) portrait of female, Kanha National Park, India. Non-ex

Ole Jorgen Liodden / Bengal tiger (Panthera tigris tigris) close up of eye, hidden in vegetation, Bandhavgarh, India.

Ole Jorgen Liodden / Bengal tiger (Panthera tigris tigris) portrait, Bandhavgarh National Park, India.

Theo Webb / Bengal tiger (Panthera tigris) cubs following their mother, Bandhavgarh National Park, India.

Theo Webb / Bengal Tiger (Panthera tigris) six month old cub jumping on its mother, Bandhavgarh National Park, India.

Theo Webb / Male Indian peafowl (Pavo cristatus) displaying to attract a female, Bandhavgarh National Park, India.

Axel Gomille / Bengal tiger (Panthera tigris tigris), female resting and looking up Kanha National Park, India.

Nick Garbutt / Male Bengal tiger (Panthera tigris tigris) known as 'Sundar' (B2) patrolling territory, Bandhavgarh National Park, Madhya Pradesh, India. Endangered species.

Danny Green / Adult Sloth Bear (Melursus ursinus) scratching its back against a tree, Bandhavgarh National Park, India, February.

Axel Gomille / Tiger (Panthera tigris tigris) cub, Bandhavgarh National Park, India

Andrew Parkinson / Hanuman / Northern Plains Grey Langur (Presbytis entellus) two youngsters chase each other up a sloping tree. Bandhavgarh National Park, India.

John Downer / Bengal Tiger (Panthera tigris tigris) mother and cub, Pench National Park, Madhya Pradesh, India, taken on location for 'Tiger - Spy in the Jungle'

Mary McDonald / Northern Plains grey Langur (Semnopithecus entellus) baby holding onto mother, Bandhavgarh National Park, Madhya Pradesh, India

Mary McDonald / Red Junglefowl (Gallus gallus murghi) male. Kanha National Park, Madhya Pradesh, India

Mary McDonald / Indian Peafowl / Blue Peafowl / Peacock (Pavo cristatus) male with large display fan tail. Pench National Park, Madhya Pradesh, India.

Mary McDonald / Domesticated Indian Elephant (Elephas maximus indicus) baby sheltering under its mother, in chains. Pench National Park, Madhya Pradesh, India.

Mary McDonald / Hanuman Langur / Northern Plains Grey Langur (Semnopithecus entellus) in leafless tree top. Kanha National Park, Madhya Pradesh, India.

Mary McDonald / Hanuman Langur / Northern Plains Grey Langur (Semnopithecus entellus) baby playing with a stick by its mother. Kanha National Park, Madhya Pradesh, India.

Mary McDonald / Hanuman Langur / Northern Plains Grey Langur (Semnopithecus entellus) baby playing with a stick by its mother. Kanha National Park, Madhya Pradesh, India.

Mary McDonald / Hanuman Langur / Northern Plains Grey Langur (Semnopithecus entellus) mother with baby in tree. Kanha National Park, Madhya Pradesh, India.