Ammonite / Baird's tapir (Tapirus bairdii) entering a pool of water and wallowing, footage taken at night using thermal camera technology, Santa Rosa National Park, Costa Rica.

Ammonite / African lioness (Panthera leo) growling and swatting at a sub-adult male approaching a kill, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Water buffalo (Bubalus arnee) chasing Sri Lankan leopard (Panthera pardus kotiya) near a waterhole, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Family of Sri Lankan elephant (Elephas maximus maximus) drinking at waterhole, footage taken at night using thermal camera technology, showing cooling thermoregulatory properties of ears, Yala Nationa...

Nick Upton / Thermal imager used to confirm there is a Hedgehog (Erinaceus europaeus) hidden in a nest where a sniffer dog has indicated it has found one, Hartpury University, Gloucestershire, UK, June 2019. Model...

Nick Upton / Lucy Bearman-Brown using a thermal imager to find Hedgehogs (Erinaceus europaeus) out foraging after dark, Hartpury University, Gloucestershire, UK, June 2019. Model released.

Nick Upton / Lucy Bearman-Brown using a thermal imager to find Hedgehogs (Erinaceus europaeus) out foraging after dark, Hartpury University, Gloucestershire, UK, June 2019. Model released.

Nick Upton / Lucy Bearman-Brown using a thermal imager to confirm there is a Hedgehog (Erinaceus europaeus) hidden in a nest where a sniffer dog has indicated it has found one, Hartpury University, Gloucestershire...

Ashley Cooper / Thermal imaging camera showing heat loss from a hot water pipe.

Ashley Cooper / Technician using thermal imaging camera to check the thermal efficiency of a house, and where heat is lost from the house.

Ammonite / Baird's tapir (Tapirus bairdii) wallowing in a pool of water, footage taken at night using thermal camera technology, Santa Rosa National Park, Costa Rica.

Ammonite / Baird's tapir (Tapirus bairdii) smelling the air, footage taken at night using thermal camera technology, Santa Rosa National Park, Costa Rica.

Ammonite / Baird's tapir (Tapirus bairdii) eating foliage, footage taken at night using thermal camera technology, Santa Rosa National Park, Costa Rica.

Ammonite / Baird's tapir (Tapirus bairdii) eating foliage, footage taken at night using thermal camera technology, Santa Rosa National Park, Costa Rica.

Ammonite / Pair of Mantled howler monkeys (Alouatta palliata) mating, footage taken at night using thermal camera technology, Santa Rosa National Park, Costa Rica.

Ammonite / African lioness (Panthera leo) stalking and playing with cub, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Group of African lion (Panthera leo) cubs playing with their mother and another lioness, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Sub-adult African lioness (Panthera leo) stalking, chasing and missing a small group of Topi (Damaliscus lunatus), footage taken at night using thermal camera technology without artificial lighting, M...

Ammonite / Group of sub-adult African lions (Panthera leo) chasing each other whilst playing, footage taken at night using thermal camera technology without artificial lighting, Masai Mara, Kenya.

Ammonite / Sub-adult African lioness (Panthera leo) stalking, chasing and jumping on Hippopotamus (Hippopotamus amphibius), footage taken at night using thermal camera technology without artificial lighting, Mas...

Ammonite / African lioness (Panthera leo) stalking, chasing and missing group of Impala (Aepyceros melampus), footage taken at night using thermal camera technology without artificial lighting, Masai Mara, Kenya...

Ammonite / Hippopotamus (Hippopotamus amphibius) dung spreading with tail, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / African lioness (Panthera leo) carrying Thomson's gazelle fawn prey, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / African lioness (Panthera leo) stalking and failing to catch Thomson's gazelles (Eudorcas thomsoni) lying in the grass, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Female African elephant (Loxodonta africana) smelling the air with her trunk, accompanied by her calf, footage taken at night using thermal camera technology, showing cooling thermoregulatory properti...

Ammonite / Female African elephant (Loxodonta africana) feeding from a tree, footage taken at night using thermal camera technology, showing cooling thermoregulatory properties of ears, Masai Mara, Kenya.

Ammonite / African elephant (Loxodonta africana) calf approaching mother feeding from a tree, footage taken at night using thermal camera technology, showing cooling thermoregulatory properties of ears, Masai Ma...

Ammonite / African lioness (Panthera leo) dragging kill from undergrowth, followed by cubs, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Close-up of African lions (Panthera leo) feeding on kill, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / African lions (Panthera leo) feeding on kill, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Two African lion (Panthera leo) cubs playing, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Group of African lions (Panthera leo) feeding on kill, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Two African lion (Panthera leo) cubs playing, with other lions feeding in the background, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Two African lion (Panthera leo) cubs playing, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Masai herding Domestic cattle (Bos taurus), footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Two African lion (Panthera leo) cubs wrestling with each other, with a third cub in the background, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Masai herding Domestic cattle (Bos taurus), footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Close-up of group of Spotted hyenas (Crocuta crocuta) feeding on Wildebeest (Connochaetes taurinus) kill, footage taken at night using thermal camera technology, Masai Mara, Kenya.

Ammonite / Group of Spotted hyenas (Crocuta crocuta) feeding on Wildebeest (Connochaetes taurus) kill, with focus shift to reveal rest of Wildebeest herd standing in the background, footage taken at night using...

Ammonite / Group of juvenile African lions (Panthera leo) playing with rib bones from kill, footage taken at night using thermal camera technology, Moremi Game Reserve, Botswana.

Ammonite / Young African lioness (Panthera leo) attacking another after being chased away from feeding at a kill, footage taken at night using thermal camera technology, Moremi Game Reserve, Botswana.

Ammonite / Sloth bear (Melursus ursinus) digging for termites, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Tilting shot up revealing two Sri Lankan leopard (Panthera pardus kotiya) cubs resting in a tree, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Sri Lankan leopard (Panthera pardus kotiya) scent marking, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Male Sri Lankan elephant (Elephas maximus maximus) feeding, footage taken at night using thermal camera technology without artificial lighting, Yala National Park, Sri Lanka.

Ammonite / Male Sri Lankan leopard (Panthera pardus kotiya) cub cleaning paws, footage taken at night using thermal camera technology without artificial lighting, Yala National Park, Sri Lanka.

Ammonite / Two poachers walking in forest, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Sri Lankan leopard (Panthera pardus kotiya) carrying monkey prey in mouth, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Sri Lankan leopard (Panthera pardus kotiya) plucking fur from and feeding on monkey prey, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Sri Lankan leopard (Panthera pardus kotiya) feeding on monkey prey, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Sri Lankan leopard (Panthera pardus kotiya) feeding on monkey prey behind undergrowth, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Two Sri Lankan leopards (Panthera pardus kotiya) play fighting on road, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Pair of Sri Lankan leopards (Panthera pardus kotiya) mating on road, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Sri Lankan leopard (Panthera pardus kotiya) feeding on Chital deer (Axis axis) prey, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Sri Lankan leopard (Panthera pardus kotiya) feeding on Chital deer (Axis axis) prey, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ammonite / Sri Lankan leopard (Panthera pardus kotiya) feeding on Chital deer (Axis axis) prey, footage taken at night using thermal camera technology, Yala National Park, Sri Lanka.

Ingo Arndt / Thermal imaging of a Honey bee (Apis mellifera) colony in an abandoned Black woodpecker nest in a tree cavity, forming a heat 'ball' at the top of the cavity, Germany. May. (small repro only)

Ingo Arndt / Thermal imaging of Honey bee (Apis mellifera) brood comb. Cooler parts appear darker, warmer parts appear bright in colour. Very bright spots showing worker bees heating brood cells with the help of t...

Ingo Arndt / Thermal imaging of Honey bee (Apis mellifera) brood comb. Cooler parts appear darker, warmer parts appear bright in colour. Very bright spots showing worker bees heating brood cells with the help of t...

Ingo Arndt / Thermal image of a Honey bee (Apis mellifera) colony in an abandoned Black woodpecker nest in a tree cavity, viewed from the nest entrance at night. Cooler parts appear darker, warmer parts appear bri...

Ingo Arndt / Honey bee (Apis mellifera), brood comb photographed with thermal camera. Cooler parts appear dark in colour while warmer parts appear bright. Very bright spots show worker bees heating brood cells wit...