A newborn Asian elephant is helped by his mother at Pairi Daiza wildlife park in Brugelette, Belgium. (Francois Lenoir/Reuters)
Lemurs eat at Qingdao Forest Wildlife World in Qingdao, China. (China Daily/Reuters)
Swans gather on a partially ice-covered lake near the village of Urozhainy, Russia. (Andrei Kasprishin/Reuters)
A grey crowned crane looks at visitors from its enclosure at the Olmense Zoo in Belgium. (Yves Herman/Reuters)
A Western Lowland Gorilla baby named Mjukuu on the back of its mother Mbeli at Taronga Zoo in Sydney, Australia. (David Gray/Reuters)
A polar bear, which arrived from Russia, is pictured at Sao Paulo Aquarium, Brazil. (Jose Patricio/Reuters)
A stag deer covers his antlers with bracken in Richmond Park in west London, Britain. (Toby Melville/Reuters)
Giant panda cubs at a panda breeding centre in Ya'an, Sichuan province, China. (Reuters)
A hyena eyes a herd of zebra at Lake Nakuru National Park, Kenya. (Joe Penney/Reuters)
Wildlife health technician Cassia Devison feeds a female polar bear cub in the intensive care unit of the Toronto Zoo. (Deborah Baic/The Globe and Mail)
Cats crowd the harbour on Aoshima Island in the Ehime prefecture in southern Japan. (Thomas Peter/Reuters)
The wing of a Giant Owl butterfly at the San Diego Zoo Safari Park in California. (Mike Blake/Reuters)
A flamingo and chicks are seen in a corral before being fitted with identity rings at the Fuente de Piedra nature reserve in Spain. (Jon Nazca/Reuters)
A keeper feeds a four-week-old jaguar at a zoo in Ciudad Juarez, Mexico. (Jose Luis/Reuters)
A female polar bear and her cub at the mouth of the Seal River on shores of Hudson Bay in Churchill, Manitoba. (John Lehmann/The Globe and Mail)
Dairy cows nuzzle a barn cat as they wait to be milked at a farm in Granby, Quebec. (Christinne Muschi/Reuters)
A beluga whale sprays water towards visitors during a summer attraction at the Hakkeijima Sea Paradise aquarium in Yokohama, Tokyo. (Toshifumi Kitamura/AFP/Getty Images)