Paul Williams / Spectral tarsier (Tarsius tarsier) returning to sleep in fig tree after a night hunting, Tangkoko, Sulawesi, Indonesia.
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Cyril Ruoso / Ring-tailed Lemur (Lemur catta) group huddles for warmth as they sleep, vulnerable, Berenty Private Reserve, Madagascar
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Juergen Freund / Spectacled flying fox (Pteropus conspicillatus) babies swaddled up in cloth ready to sleep, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.
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Juergen Freund / Spectacled flying fox (Pteropus conspicillatus) babies swaddled in cloth ready to sleep, Tolga Bat Hospital, Atherton, North Queensland, Australia. January 2008.
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John MacPherson / 2020VISION / Bottlenose dolphin (Tursiops truncatus) mother and calf breaking surface, Moray Firth, Scotland, UK, June 2011. Did you know? Dolphins can swim to the surface to breathe even when sleeping, as they ca...
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Sergey Gorshkov / Red fox (Vulpes vulpes) fox waking up from sleep in den in deep snow, stretching and yawning, Kamchatka, Far east Russia, November
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Alex Mustard / A group of Florida manatees (Trichechus manatus latirostrus) sleeping in the afternoon at Three Sisters Spring. Crystal River, Florida, USA. Manatees sleep on the bottom of the spring, floating up per...
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Alex Mustard / A group of Florida manatees (Trichechus manatus latirostrus) sleeping in the afternoon at Three Sisters Spring. Manatees sleep on the bottom of this shallow spring, occasionally rising to the surface...
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Anup Shah / African lion (Panthera leo) adult male fighting back against the adolescent male who has disturbed his sleep, Masai Mara National Reserve, Kenya. March.
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Enrique Lopez-Tapia / Asian palm civet (Paradoxurus hermaphroditus) lying down on coffee shop counter. Many civets are drugged to sleep quietly and not escape. Coffee beans are fed to civets, ferment in the gut, excreted a...
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Enrique Lopez-Tapia / Coffee shop with Asian palm civet (Paradoxurus hermaphroditus) on counter. Many civets are drugged to sleep quietly and not escape. Coffee beans are fed to civets, ferment in the gut, excreted and use...