Paul Williams / Kinabalu Giant red leech (Mimobdella buettikoferi) feeding on Kinabalu Giant earthworm (Pheretima darnleiensis), Mount Kinabalu, Borneo.

Paul Williams / Moose (Alces alces) female with twin calves, Baxter State Park, Maine, USA, June.

Paul Williams / Sumatran tiger (Panthera tigris sumatrae) close up portrait, captive.

Paul Williams / Lion (Panthera leo) close up of teeth while its snarling, captive.

Paul Williams / RF - Sumatran tiger (Panthera tigris sumatrae) close up portrait, captive. staring at camera, licking nose, captive. (This image may be licensed either as rights managed or royalty free.)

Paul Williams / RF - Lion (Panthera leo) portrait, looking proud, Captive (This image may be licensed either as rights managed or royalty free.)

Paul Williams / Lightning storm, Western Australia. December 2013. Image stacking / composite composed of three consecutive images.

Paul Williams / Budgerigars (Melopsittacus undulatus) flocking to find water, Northern Territory, Australia

Paul Williams / Spectral tarsier (Tarsius tarsier) returning to sleep in fig tree after a night hunting, Tangkoko, Sulawesi, Indonesia.

Paul Williams / Javan slow loris (Nycticebus javanicus) rescued by Jakarta Animal Aid Network (JAAN), in holding cage, Animal rescue centre, Jakarta, Indonesia. Critically Endangered. Post production to remove light...

Paul Williams / Red leaf monkey (Presbytis rubicunda) mother holding baby, Danum Valley, Sabah, Borneo, Malaysia August.

Paul Williams / View from plane of landscape between Alice Springs and Perth, Australia, November.

Paul Williams / View from plane of eroded salt dome, Kavir Desert, Iran, December.

Paul Williams / Tourists watching two wild Jaguar cubs fight on riverbank whilst third looks on from above (Panthera onca) from boat on river, Pantanal, Pocone, Brazil. No release available.

Paul Williams / Giant otter (Pteronura brasiliensis) adult playing with plastic bottle, Pantanal, Pocone, Brazil

Paul Williams / Kinabalu Giant red leech (Mimobdella buettikoferi) feeding on Kinabalu Giant earthworm (Pheretima darnleiensis), Mount Kinabalu, Borneo.

Paul Williams / Kinabalu Giant red leech (Mimobdella buettikoferi) feeding on Kinabalu Giant earthworm (Pheretima darnleiensis), Mount Kinabalu, Borneo.

Paul Williams / Kinabalu Giant red leech (Mimobdella buettikoferi) feeding on Kinabalu Giant earthworm (Pheretima darnleiensis), Mount Kinabalu, Borneo.

Paul Williams / Bearded pig (Sus barbatus) digging in sand, foraging for crabs on beach, Bako National Park, Sarawak, Borneo

Paul Williams / Bearded pig (Sus barbatus) digging in sand, foraging for crabs on beach, Bako National Park, Sarawak, Borneo

Paul Williams / Bearded pig (Sus barbatus) digging in sand, foraging for crabs on beach, Bako National Park, Sarawak, Borneo

Paul Williams / Bearded pig (Sus barbatus) digging in sand, foraging for crabs on beach, Bako National Park, Sarawak, Borneo

Paul Williams / Bearded pig (Sus barbatus) foraging for crabs on beach, Bako National Park, Sarawak, Borneo

Paul Williams / Bearded pig (Sus barbatus) foraging for crabs on beach, Bako National Park, Sarawak, Borneo

Paul Williams / Bearded pig (Sus barbatus) foraging for crabs on beach, Bako National Park, Sarawak, Borneo

Paul Williams / Bearded pig (Sus barbatus) foraging for crabs on beach, Bako National Park, Sarawak, Borneo

Paul Williams / Bearded pig (Sus barbatus) close up of snout, Bako National Park, Sarawak, Borneo

Paul Williams / Bearded pig (Sus barbatus) foraging for crabs on beach, Bako National Park, Sarawak, Borneo

Paul Williams / Research team looking for Pallas cats, during production of Big Cats series, Altanbulag, Mongolia. July 2017.

Paul Williams / Clouds over steppe grassland, Altanbulag, Mongolia.

Paul Williams / Film crew working on Big Cats series lived for 4 weeks in gers / yurts when filming the rare Pallas's cat. Altanbulag, Mongolia 2017

Paul Williams / Bactrian camel (Camelus bactrianus) Steppe grassland, Altanbulag, Mongolia.

Paul Williams / Horses grazing in steppe grassland, Altanbulag, Mongolia.

Paul Williams / Horses grazing in steppe grassland, Altanbulag, Mongolia.

Paul Williams / Amur Leopard (Panthera pardus orientalis) close up portrait, Captive.

Paul Williams / Amur Leopard (Panthera pardus orientalis) close up portrait, Captive.

Paul Williams / Lion (Panthera leo) close up portrait, captive

Paul Williams / Lion (Panthera leo) close up portrait, captive

Paul Williams / Vans driving in the Mongolian steppe whilst searching for Pallas' cat (Otocolobus manul), on location for Big Cats series. Altanbulag, Mongolia, June 2017.

Paul Williams / Traditional yurts at sunrise, Altanbulag, Steppe grassland, Mongolia, June 2017.

Paul Williams / Double rainbow over traditional gers / yurts, steppe grassland, Altanbulag, Mongolia, June 2017.

Paul Williams / Camera operator Sue Gibson, working in steppe grasslands, Altanbulag, Mongolia, July 2017.

Paul Williams / Using a specialist motion control rig to film underwater timelapse in a rockpool. On production for BBC Blue Planet II, Vancouver island, British Columbia, Canada, July.

Paul Williams / Ochre starfish (Pisaster ochraceus) Goose barnacles (Pollicipes polymerus) California mussel (Mytilus californianus) and Giant green anenome (Anthopleura xanthogrammica) in rock pool, Vancouver Island...

Paul Williams / Cameraman Murray Fredericks films a wildfire triggered by lightning for Storm Chasing programme in Northern Australia for BBC Wonders of The Monsoon. Western Australia. December 2013.

Paul Williams / Bush fire triggered by lightning storm, Western Australia. December 2013.

Paul Williams / Bush fire triggered by lightning storm, Western Australia. December 2013.

Paul Williams / Bush fire triggered by lightning storm, Western Australia. December 2013.