Martin Dohrn / Herd of giraffes (Giraffa camelopardalis) resting at night, Masai Mara, Kenya. Image taken at night using thermal camera technology, with no artificial light.
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Martin Dohrn / Wide panoramic night thermal camera shot of Asian elephants (Elephas maximus) and a herd of Spotted / Chital / Axis deer (Axis axis) in Yala National Park, Sri Lanka
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Martin Dohrn / Thermal camera image of hippos (Hippopotamus amphibius), crocodile (Crocodylus niloticus) and wildebeest (Connochaetes taurinus, far left) on the banks of the Mara River, Masai Mara, Kenya. Image take...
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Martin Dohrn / Sleeping African elephants (Loxodonta africana), two adults and offspring, Masai Mara, Kenya. Image taken at night using thermal camera technology without artificial light.
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Martin Dohrn / Hippo (Hippopotamus amphibius) in threat pose, Masai Mara, Kenya. Image taken at night using thermal camera technology without artificial lighting.
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Martin Dohrn / Lionesses (Panthera leo) killing zebra, Masai Mara, Kenya. Image taken at night using thermal Camera technology without artificial lighting. Can only be used if National Geographic "Night of the Lio...
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Gerry Ellis / Sunrise through thermal fog and lone tree, Snake River, Grand Teton National Park, Wyoming
Nick Garbutt / RF - American bison (Bison bison) male standing near Punch Bowl thermal pool, green algae in foreground. Yellowstone National Park, USA. (This image may be licensed either as rights managed or royalty...
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Ashley Cooper / Thermal imaging camera showing heat loss from a hot water pipe.
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Ashley Cooper / Technician using thermal imaging camera to check the thermal efficiency of a house, and where heat is lost from the house.
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Nick Garbutt / RF - Herd of American Bison (Bison bison) around geo-thermal features. Firehole River Valley. Yellowstone National Park, Wyoming, USA. January 2008. (This image may be licensed either as rights manage...