945-816 - Male lions (Panthera leo), Masai Mara, Kenya, East Africa, Africa

945-815 - Male lions (Panthera leo), Masai Mara, Kenya, East Africa, Africa

945-810 - Hippopotamus yawning in a bath, Masai Mara, Kenya, East Africa, Africa

1130-5871 - Lion Cub In Long Grass & Wind, Maasai Mara, Kenya, Africa

1130-5819 - Lion Cub Walking, Maasai Mara, Kenya, Africa

1130-5833 - Female Cheetah & Cub, Maasai Mara, Kenya, Africa

1130-5818 - Lioness Yawning, Maasai Mara, Kenya, Africa

1130-5828 - Female Cheetah & Cubs, Maasai Mara, Kenya, Africa

1130-5830 - Female Cheetah & Cubs Playing, Maasai Mara, Kenya, Africa

1130-5868 - Lioness & Cub In Long Grass, Maasai Mara, Kenya, Africa

1130-5810 - Lion Cub Yawning, Maasai Mara, Kenya, Africa

1130-5724 - Female Cheetah observing with cubs, Maasai Mara, Kenya, Africa

1130-5729 - Female Cheetah sat with cub, Maasai Mara, Kenya, Africa

1130-5591 - Leopard Yawning On Rock, Maasai Mara Kenya, Africa

1130-5653 - Lioness Yawning, Maasai Mara, Kenya, Africa

1130-5594 - Leopard Yawning On Rocks, Maasai Mara Kenya, Africa

1130-5657 - Young Lioness Stood Yawning, Maasai Mara, Kenya, Africa

1182-100 - Leopard (Panthera pardus) lying in a cage at the Lubumbashi Zoo, Democratic Republic of Congo, DRC, Africa

1130-5123 - Cheetah cubs & mother; Maasai Mara, Kenya, Africa

1130-5129 - Three cheetahs in a line; Maasai Mara, Kenya, Africa

1130-5151 - Sleepy lioness yawning; Maasai Mara, Kenya, Africa

1130-5107 - Cheetah cubs relaxing; Maasai Mara, Kenya, Africa

1130-5101 - Female cheetah relaxing; Maasai Mara, Kenya, Africa

1130-4727 - Leopard yawning in tree, Maasai Mara, Kenya, Africa

1130-4769 - Cheetah cub sat in long grass, Maasai Mara, Kenya, Africa

1130-4619 - Female Cheetah & cub in long grass, Masai Mara, Kenya, Africa

1130-4613 - Female Cheetah yawning, Masai Mara, Kenya, Africa

1130-4610 - Cheetah cub yawning, Masai Mara, Kenya, Africa

1159-1256 - Mid shot of polar bear (Ursus maritimus) yawning, Antarctica

1159-1254 - Mid shot of polar bear (Ursus maritimus) yawning, Antarctica

1159-1200 - African lion (Panthera leo) portrait in wind, licks nose and yawns, Africa

1182-45 - A Lioness, female Lion (Panthera leo) lying in dry long grass yawning, smelling the air, wiping it's nose, face with it's paw. Africa, African bushveld, dry winter grass

1157-434 - Polar bear lying on frozen lake, Churchill, Manitoba, Canada

1159-804 - southern elephant seal (Mirounga leonina) male roars

1159-799 - southern elephant seal (Mirounga leonina) sub adult male roars

1159-803 - southern elephant seal (Mirounga leonina) male roars

1130-2041 - Sumatran tiger yawning, flamingo land zoo, North Yorkshire

1159-599 - Gentoo penguin (Pygoscelis papua) close chicks huddle, beg, yawn and sleep

1159-607 - Gentoo penguin (Pygoscelis papua) close chicks huddle, beg, yawn and sleep

1157-121 - Giant Pandas, Chengdu Panda Base, Sichuan, China

1157-101 - Golden monkeys, Qinling mountains, Shaanxi, China

1010-1762 - Manatee yawns, breathes, Rest. Florida, North Atlantic Ocean

1010-990 - Southern Elephant Seals (Mirounga leonina) Harem sleeping on beach. San Simeon, California, Pacific

1010-980 - Southern Elephant Seals (Mirounga leonina) pups at beach. San Simeon, California, Pacific

1010-988 - Southern Elephant Seals (Mirounga leonina) Yawning. San Simeon, California, Pacific

1130-304 - Yawning Sweet Seller Spice Bazaar, Istanbul, Turkey

945-161 - Mountain gorilla (Gorilla gorilla beringei). Endangered. Juvenile yawns. Rwanda. 2009

1114-1853 - Couple in a field running

1114-1189 - Vervet Monkey yawning and laying on branches of tree, Vervet Monkey Foundation, Tzaneen, South Africa

1114-986 - Standing Sea Lion yawning and then touching hand of young female Sea Lion Trainer with fence and wall behind, Curacao Sea Aquarium, ABC islands of the Leeward Antilles, Lesser Antilles

1114-976 - Relaxed Gray Seal with eyes closed yawning, National Seal Sanctuary, Gweek, Cornwall, UK

1114-991 - Relaxed Gray Seal touching his head with a flipper, National Seal Sanctuary, Gweek, Cornwall, UK

1114-822 - Close up of Meerkat yawning, Kalahari Desert, South Africa

1114-846 - Close up of Mole snake opening mouth, Kalahari Desert, South Africa

1114-367 - Seated adult Cheetah looking at camera, Safari de Peaugres, France

1114-361 - Close up of Cheetah mother looking at camera with cub stretching, South Africa

1114-381 - Adult Cheetah laying on ground as cub climbs over adult, Safari de Peaugres, France

1114-48 - Close up of African Lion face as he yawns, Knowsley Safari Park, Merseyside, United Kingdom, Europe

1114-9 - Juvenile Male Northern Buff-Cheeked Gibbon yawning and looking around, Mulhouse Zoo, France

1034-522 - Leopard seal (Hydrurga leptonyx) on ice floe. Antarctic Peninsula

1034-523 - Leopard seal (Hydrurga leptonyx) on ice floe. Antarctic Peninsula

1034-525 - Leopard seal (Hydrurga leptonyx) on ice floe. Antarctic Peninsula

1034-520 - Leopard seal (Hydrurga leptonyx) on ice floe. Antarctic Peninsula

1034-524 - Leopard seal (Hydrurga leptonyx) on ice floe. Antarctic Peninsula

1034-519 - Leopard seal (Hydrurga leptonyx) on ice floe. Antarctic Peninsula