Martin Dohrn / Group of lions (Panthera leo) at night, Masai Mara, Kenya. Photographed using 'Starlight Camera' technology without artificial lighting.

Markus Varesvuo / Tengmalm's Owl (Aegolius funereus) close-up of eye. Kuusamo Finland, May. Winner of the Birds Category in the Finnish Nature Photo of the Year Competition 2013

Sven Zacek / Female Long-eared owl (Asio otus) peeking from behind a spruce tree, Southern Estonia, June.

Paul Harris / 2020VISION / Man and child looking at Barn Owl at the Black Country Living Wildlife Roadshow, Sandwell Park Farm, West Bromwich, West Midlands, August 2011. Did you know? Although owls have excellent night vision...

Martin Dohrn / Three hyenas (Crocuta crocuta) approaching a resting lion (Panthera leo) at night. Topi Plain, Masai Mara, Kenya. Image taken using an infared camera with no artificial visible light, on location for...

Martin Dohrn / Group of hyena (Crocuta crocuta) playing in deep rain puddle at night. Topi Plain, Masai Mara, Kenya. Image taken using "starlight camera" with no artificial light, on location for National Geographi...

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...

Martin Dohrn / Lions (Panthera leo) approaching rhinoceros, Masai Mara, Kenya. Photographed at night using 'Starlight Camera' technology without artificial lighting.

Martin Dohrn / Pride of lions (Panthera leo) in Masai Mara, Kenya. Photographed at night using 'Starlight Camera' technology without artificial lighting.

Sebastian Kennerknecht / Serval (Leptailurus serval) at night, Kafue National Park, Zambia

Sebastian Kennerknecht / Leopard (Panthera pardus) female at scent-marking spray-tree at night, Kafue National Park, Zambia

Sebastian Kennerknecht / Jaguar (Panthera onca) male in rainforest at night, Coastal Jaguar Conservation Project, Tortuguero National Park, Costa Rica