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.

Martin Dohrn / Chital / Spotted deer (Axis axis) grazing at the waters edge with storks and egrets roosting above. Yala National Park, Sri Lanka. Image taken at night using thermal camera technology without artifici...

Martin Dohrn / Chital / Spotted deer herd (Axis axis), Yala National Park, Sri Lanka. Image taken at night using infa red camera technology without artificial light.

Martin Dohrn / Lioness (Panthera leo) growling at hers and her sister's unruly cubs as they try to persuade their mother to take them hunting. Masai Mara, Kenya. Image taken at night using thermal camera technology...

Martin Dohrn / Zebras (Equus quagga) and wildebeest (Conochaetes taurinus) grazing together, Masai Mara, Kenya. Image taken at night using Thermal Camera technology without artificial lighting.

Martin Dohrn / Indian Elephant family foraging at night. Photographed at night using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Crocodiles (Crocodylus niloticus) and hippos (Hippopotamus amphibius) resting at night on river bank, Masai Mara, Kenya. Image taken using starlight camera technology with no artificial light.

Martin Dohrn / Herd of wildebeest (Connochaetes taurinus) feeding and resting at night. Image taken at night using thermal camera technology, with no artificial light.

Martin Dohrn / Indian elephants (Elephas maximus) at night, Yala National Park, Sri Lanka. Image taken using thermal camera technology with no artificial light.

Martin Dohrn / Pack of hyenas (Crocuta crocuta) feeding on prey at night with black-back jackals (Canis mesomelas). Image taken at night using thermal camera technology, with no artificial light.

Martin Dohrn / Herd of wildebeest (Connochaetes taurinus) feeding at night. Photographed using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Two lionesses walking along road with three cubs, Masai Mara, Kenya.

Martin Dohrn / Lionesses resting, Masai Mara, Kenya. Image taken at night using thermal camera technology, with no artificial light.

Martin Dohrn / Male lion (Panthera leo) feeding on wildebeest carcass, lioness observing. Masai Mara, Kenya. Photographed at night using Thermal Camera technology without artificial lighting.

Martin Dohrn / Alex Verner and Clinton Edwards in filming vehicle by moonlight, on location for "Night of the Lion", 2009. Thermal camera technology was used to film lions at night. Can only be used if National Geo...

Martin Dohrn / Martin Dohrn operating camera for filming at night, Masai Mara, Kenya, 2009, Can only be used if National Geographic "Night of the Lion" is mentioned.

Martin Dohrn / Alex Verner in filming vehicle operating thermal cameras, on location for "Night of the Lion", 2009. Can only be used if National Geographic "Night of the Lion" is mentioned

Martin Dohrn / Lions (Panthera leo) feeding in Masai Mara, Kenya. Image taken at night using thermal camera technology without artificial lighting. Can only be used if National Geographic "Night of the Lion" is me...

Martin Dohrn / Lions (Panthera leo) hunting hippopotamus, Masai Mara, Kenya. Image taken at night using 'Starlight Camera' technology without artificial lighting. Can only be used if National Geographic "Night of...

Michael Durham / Brazilian Free-tailed Bat (Tadarida brasiliensis) group emerging from Bracken Cave at dusk, Texas

Michael Durham / Brazilian Free-tailed Bat (Tadarida brasiliensis) group emerging from James Eckert River Bat Cave at dusk, Texas (composite image)

Martin Dohrn / Red Lily flowers {Lilium pomponium} Maritime Alps, France

Martin Dohrn / Water lilies {Nymphaeacae} growing in Bosherston Pools (National trust), Pembrokeshire, Wales, UK

Michael Durham / California Leaf-nosed Bat (Macrotus californicus) flying at night, Copper Mountains, Cabeza Prieta National Wildlife Refuge, Arizona

Martin Dohrn / Meadow brown butterfly {Maniola jurtina} on bramble flower, UK

Martin Dohrn / Sun shining behind cloud formations over sea with boat on horizon, Sussex, UK

Martin Dohrn / Aerial view of mixed broadleaf woodland in autumn, Auvergne, France.

Martin Dohrn / View of Queenstown, from top of mountain, New Zealand

Martin Dohrn / Aerial view of Gold mining in the Amazon basin, State of Para, Brazil

Martin Dohrn / Kayapo Indian village with straw huts, Brazil.

Martin Dohrn / Schrader Ranges landscape in the highlands of Papua New Guinea

Martin Dohrn / Matai trees and ferns in Temperate Rainforest, New Zealand

Martin Dohrn / Portrait of Hagahai hunter holding bow & arrows and child, Papua New Guinea 1992

Martin Dohrn / Hagahai warriors standing on stone in grassland, hunting pigs, smoking them out of field, Papua New Guinea 1992

Martin Dohrn / Arara Indian boy outside hut home, Xingu River, Amazon Basin, Brazil, South America, 1994

Martin Dohrn / Aerial view of river with introduced Willow and Poplar trees, Arrowtown, New Zealand

Martin Dohrn / Portrait of Kayapo indian boy with body painted using plant dye, Amazon Basin, Brazil

Martin Dohrn / Golden ringed dragonfly larva {Cordulegaster boltonii} UK

Martin Dohrn / Mosquito {Culex pipiens} emerging from pupa at water surface, UK

Martin Dohrn / Larvae of Mosquito {Culex pipiens} filter feeding at surface of water, UK

Martin Dohrn / Mosquito {Culex pipiens} emerging from pupa at water surface, UK

Martin Dohrn / Looking up in Silver birch forest canopy in winter {Betula verrucosa} K

Michael Durham / Veiled Chameleon (Chamaeleo calyptratus) a juvenile female hunting, native to North Africa, Yemen to Saudi Arabia

Michael Durham / Veiled Chameleon (Chamaeleo calyptratus) a juvenile female hunting, native range is North Africa, Yemen to Saudi Arabia

Martin Dohrn / Huli wigman standing on traditional suspension bridge above river, Papua New Guinea

Martin Dohrn / Hagehai hunter and child holding weapons, Papua New Guinea

Martin Dohrn / European Alps - aerial view in winter with snow on mountains

Martin Dohrn / Larva of Cardinal beetle (Pyrochroa serraticornis) in Birch log, UK

Martin Dohrn / Common hawker (Aeshna juncea) male recently emerged from chrysalis, UK

Martin Dohrn / Schrader Ranges landscape, in highlands of Papua New Guinea

Martin Dohrn / Hagehai warriors hunting pigs, smoking them out of field, Papua New Guinea

Martin Dohrn / Hagehai warrior sitting by river, Papua New Guinea

Martin Dohrn / Jimi River flowing through Schrader Ranges, Highlands, Papua New Guinea

Martin Dohrn / Stream / dyke created for drainage Southern England, summer UK

Michael Durham / Yuma Myotis (Myotis yumanensis) portrait, Rogue River National Forest, Oregon

Michael Durham / Barn Owl (Tyto alba) perching on tree branch at night with wings spread, Sauvie Island Wildlife Area, Oregon

Michael Durham / Looper Moth (Geometridae) flying at night, Willamette National Forest, Oregon

Michael Durham / Moth (Macaria sp) flying, Mt Hood National Forest, Oregon

Martin Dohrn / Aerial view of gold mining area in rainforest, Para, Brazil

Martin Dohrn / Sea star {Asteroidea} Watamu, Kenya

Martin Dohrn / Kayapo woman washing baby in river, Brazil, 1994

Martin Dohrn / Kayapo woman washing baby in river, Brazil 1994

Martin Dohrn / Kayapo indian boy with body painted with plant dye, tribal tradition, Amazon Basin, Brazil. 1994

Martin Dohrn / Cemetery at Altiplano, Andean mountains, Bolivia, South America

Martin Dohrn / Quechua wedding with men and domestic Llama in traditional wear, Bolivia, South America

Martin Dohrn / Alpine flowers growing at 5000m, Andes, Bolivia, South America

Martin Dohrn / Quechua store huts and barley crops, up in Andes, Bolivia, South America

Martin Dohrn / Quechua people watch traditional wedding ceremony, Bolivia

Martin Dohrn / Quechua store huts and barley crops, Andes, Bolivia, South America

Martin Dohrn / Food crops growing up on altiplano, Bolivia, South America

Martin Dohrn / Aerial view of river Iriri, Xingu river system and surrounding tropical rainforest, Amazon Basin

Martin Dohrn / Aerial view of Quechua settlement and fields in Andes, Bolivia, South America

Martin Dohrn / Rhesus macaques {Macaca mulatta} Temple monkeys at Varanesi, Uttar Pradesh, India

Martin Dohrn / Young Kayapo indian boy with body painted with plant dye, tribal tradition, Amazon Basin, Brazil 1994

Martin Dohrn / Quechua musician at traditional wedding ceremony, Bolivia

Martin Dohrn / Quechua wedding with man and domestic Llama in traditional wear, Bolivia, South America

Martin Dohrn / Quechua girls watch wedding ceremony, Bolivia

Martin Dohrn / Bolivian girl herding sheep on the Altiplano, Bolivia, South America

Martin Dohrn / Alpine flowers growing at 5000m, Andes, Bolivia, South America

Martin Dohrn / Quechua musician at traditional wedding ceremony, Bolivia

Martin Dohrn / Quechua people at social event, watching a bull fight contest, Bolivia, South America

Martin Dohrn / Quechua people dance at traditional wedding ceremony, Bolivia

Martin Dohrn / Quechua family at traditional wedding ceremony, Bolivia

Martin Dohrn / Looking down on Coramandel Coast, North Island, New Zealand

Martin Dohrn / Matai trees and ferns in temperate rainforest, New Zealand

Martin Dohrn / Quechua settlement and fields, Vilacayma, up in the Andes, Bolivia, South America

Martin Dohrn / Aerial view of recent rainforest deforestation, recently cleared for agriculture, Amazon Brazil, South America

Martin Dohrn / Jimi River flowing through Schrader Ranges, Highlands, Papua New Guinea

Martin Dohrn / Aerial view of rainforest destruction, Para, Brazil

Martin Dohrn / Tree ferns and Nikau palms Coramandel, New Zealand

Martin Dohrn / Aerial view of river in rainforest, Papua New Guinea

Martin Dohrn / Sunset over Amazon Rainforest after burning, South America

Martin Dohrn / Playa Nancite beach landscape, Santa Rosa, Area of Conservation Guanacaste, Costa Rica

Martin Dohrn / Kuna Indian family in boat crossing water, San Blas Islands, Panama

Martin Dohrn / Sunset over Amazon Rainforest after burning, South America

Martin Dohrn / Butterflies (Heliconidae sp) feeding on mineral deposits on Rio Iriri river bank, Kyado Settlement, Amazon Basin, South America