Orangutans
Nico Tondini / Danita Delimont / Ardea / Caters News
Giant panda and cub
Taipei City Zoo / AFP / Getty
Zebras
Attila Kisbenedek / AFP / Getty
Giraffes
Maja Hitji / AFP / Getty
African spurred tortoises
EPA
Shetland pony and foal
Jean-Michel Labat / Ardea / Caters News
Meerkats
Steve Downer / Ardea / Caters News
Polar bear and cub
M. Watson / Ardea / Caters News
Cheetah and cub
Adam Jones / Danita Delimont / Ardea / Caters News
Brown bear and cub
Stefan Meyers / Ardea / Caters News
Elephants
Manoj Shah / Ardea / Caters News
Harp seals
Keren Su / Danita Delimont / Ardea / Caters News
Lioness and cub
M. Watson / Ardea / Caters News
Pig-tailed macaque
Frans Lanting / Danita Delimont / Ardea / Caters News
Northern white-cheeked gibbon
EPA
Western lowland gorillas
Reuters
Kangaroo and joey
Reuters / Franklin Park Zoo