Felis Images / Asiatic lion (Panthera leo persica), female and cubs in morning light, cub biting mother's leg. Gir National Park, Gujarat, India. Photo© Phillip Ross/Felis Images

Felis Images / Nilgiri marten (Martes gwatkinsii) walking on a fallen branch in Mukurthi National Park, Tamil Nadu, India.

Felis Images / Spotted owlets (Athene brama) group of juveniles, Tamil Nadu, India.

Felis Images / Bengal tiger (Panthera tigris) female and two cubs walking through grass, female carrying cub in mouth. Bandhavgarh National Park, Madhya Pradesh, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) cub stalking. Bandhavgarh National Park, Madhya Pradesh, India. Photo© Phillip Ross/Felis Images

Felis Images / African lion (Panthera leo) male walking across savanna. Masai Mara, Kenya. 2015. Photo© Phillip Ross/Felis Images

Felis Images / Asiatic lion (Panthera leo persica), portrait. Gir National Park, Gujarat, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) standing in water. Bandhavgarh National Park, Madhya Pradesh, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris), portrait. Ranthambore National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) running down slope. Ranthambore National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris), two walking along track side by side. Ranthambore National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris), walking on track, tongue out, tasting air in flehmen response. Ranthambore National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) lying down, looking at camera. Bandipur National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) in distance, lying down amongst scrub. Bandipur National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Leopard (Panthera pardus) lounging in tree. Nagarhole National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) walking across track. Nagarhole National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Indian leopard (Panthera pardus fusca). Nagarhole National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Fishing cat (Prionailurus viverrinus) at water's edge, at dusk. Kakinada, Andhra Pradesh, India. Photo© Anjani Kumar/Felis Images

Felis Images / Rusty spotted cat (Prionailurus rubiginosus) female and kittens in woodland. Tadoba Andhari Tiger Reserve, Maharashtra, India. Photo© Harsha Narasimhamurthy/Felis Images

Felis Images / Indian leopard (Panthera pardus fusca). Bandipur National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) portrait. Nagarhole National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) hidden amongst vegetation in jungle. Sathyamangalam, Tamil Nadu, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) walking across track. Jim Corbett National Park, Uttarakhand, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) portrait. Jim Corbett National Park, Uttarakhand, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) walking. Jim Corbett National Park, Uttarakhand, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) lying in mud. Nagarhole National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Melanistic leopard / Black panther (Panthera pardus fusca) sitting, reflected in water. Nagarhole National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Melanistic leopard / Black panther (Panthera pardus fusca) drinking, reflected in water. Nagarhole National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) walking towards woodland and Indian leopard (Panthera pardus fusca) looking down from tree. Nagarhole Natioanl Park, Karnnataka, India. Photo© Phillip Ross/Felis Images

Felis Images / Bengal tiger (Panthera tigris) striped fur, close up. Ranthambore National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Indian leopard (Panthera pardus fusca) walking along road, tail in air. Nagarhole National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Melanistic leopard / Black panther (Panthera pardus fusca) resting in tree. Nagarhole National Park, India. Photo© Phillip Ross/Felis Images

Felis Images / Fishing cat (Prionailurus viverrinus) standing on log at night. Kakinada, Andhra Pradesh, India. Photo© Anjani Kumar/Felis Images

Felis Images / Fishing cat (Prionailurus viverrinus) standing on log at night. Kakinada, Andhra Pradesh, India. Photo© Anjani Kumar/Felis Images

Felis Images / Softshell turtle (Nilssonia sp) walking on sand at sunset. Photo© Anjani Kumar/Felis Images

Felis Images / Schneider's leaf nosed bat (Hipposideros speoris) in flight in cave. Andhra Pradesh, India. Photo© Anjani Kumar/Felis Images

Felis Images / Schneider's leaf nosed bat (Hipposideros speoris), two flying in cave. Andhra Pradesh, India. Photo© Anjani Kumar/Felis Images

Felis Images / Smooth-coated otter (Lutrogale perspicillata), two at edge of forest. Otter walking, out of focus otter nose in foreground. Andhra Pradesh, India. Photo© Anjani Kumar/Felis Images

Felis Images / Smooth-coated otter (Lutrogale perspicillata) at edge of forest. Andhra Pradesh, India. Photo© Anjani Kumar/Felis Images

Felis Images / Olive ridley turtle (Lepidochelys olivacea) hatchlings walking towards sea at sunrise. Andhra Pradesh, India. 2017. Photo© Anjani Kumar/Felis Images

Felis Images / Fishing cat (Prionailurus viverrinus) walking with fish in mouth. Andhra Pradesh, India. Photo© Anjani Kumar/Felis Images

Felis Images / Melanistic leopard / Black panther (Panthera pardus fusca) resting in tree. Nagarhole National Park, India. Andhra Pradesh, India. Photo© Srikanth GP/Felis Images

Felis Images / Indian wild dog (Cuon alpinus), portrait. Nagarhole National Park, India. Photo© Srikanth GP/Felis Images

Felis Images / Short fin mako shark (Isurus oxyrinchus) head discarded on ground, fins were dispatched for export and remaining meat cubed for sale locally. Negombo Fish Market, Sri Lanka. 2017. Photo© Vydhehi Kadur...

Felis Images / Rays (Mobulidae) caught as by-catch, in basket. For sale at Negombo Fish Market, Sri Lanka. 2017. Photo© Vydhehi Kadur/Felis Images

Felis Images / Indian leopard (Panthera pardus fusca) pair mating. Nagarhole National Park, India. Sequence 3/3. Photo© Phillip Ross/Felis Images

Felis Images / Indian leopard (Panthera pardus fusca) pair mating. Nagarhole National Park, India. Sequence 2/3. Photo© Phillip Ross/Felis Images

Felis Images / Indian leopard (Panthera pardus fusca) pair mating. Nagarhole National Park, India. Sequence 1/3. Photo© Phillip Ross/Felis Images