Ross Hoddinott / Red fox (Vulpes vulpes) vixen yawning in the morning light (captive). Lifton, Devon, UK, May
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Donald M. Jones / Yellow-bellied Marmot (Marmota flaviventris) yawning, central Montana
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Donald M. Jones / Hoary Marmot (Marmota caligata) yawning, western Montana
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Katherine Feng / Giant Panda (Ailuropoda melanoleuca) four week old cub yawning in mother's arm, Wolong Nature Reserve, China
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Jabruson / Hippopotamuses fighting (Hippopotamus amphibius) taken before major crash in numbers in the 1990s due to political instability and hunting. Rwindi sector of the Virunga National Park. Democratic Repub...
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Denis-Huot,Denis-Huot / Leopard (Panthera pardus) yawning, Masai-Mara Game Reserve, Kenya
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Cyril Ruoso / Eastern Grey Kangaroo (Macropus giganteus) yawning, Australia
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Richard Du Toit / Burchell's Zebra (Equus burchellii) yawning, Rietvlei Nature Reserve, Gauteng, South Africa
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Nick Garbutt / Adult male Hippopotamus (Hippopotamus amphibius) posturing in agressive 'yawn' behaviour, Luangwa River, South Luangwa National Park, Zambia, November
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Nick Garbutt / Adult male Hippopotamuses (Hippopotamus amphibius) posturing in aggressive 'yawn' behaviour, Luangwa River, South Luangwa National Park, Zambia, November. Digital composite (two frames stitched togeth...
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Fiona Rogers / Bornean Orang-utan (Pongo pygmaeus wurmbii) mature male 'Tom' yawning head portrait. Camp Leakey, Tanjung Puting National Park, Central Kalimantan, Borneo, Indonesia, June 2010. Rehabilitated and rele...
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Sergey Gorshkov / Red Fox (Vulpes vulpes) yawning, Kamchatka, Russia
