Koala Sabrina and her 10-month-old joey, Sapphire, produced by artificial insemination, snuggle at Currumbin Wildlife Sanctuary on the Gold Coast of Australia.

Whitetail deer try to figure out the latest addition to their herd, a white whitetail fawn at Wildwood Zoo in Marshfield, Wis.

Bonobo apes, a primate unique to Congo and humankind's closest relative, relax with a snack at a sanctuary just outside the capital Kinshasa.

Six-week-old cheetah cubs cuddle with their mother, Tonya, at the zoo in Hannover, northern Germany.

A starling makes off with a piece of bread intended for the mute swans at the Round Pond in Kensington Gardens.

A polar bear stretches on the tundra near Churchill, Manitoba, Canada. The bears are slowly congregating along the coast, anticipating the winter freeze-up of Hudson Bay.

Young Barbary Macaques study a visitor to the Cedras Forest in Morocco.

A Cayman crocodile lurks in a basin in the zoo in St. Petersburg, Russia.

Three female Asian elephants from Thailand play on a mound of dirt in their new enclosure at Sydney's Taronga Zoo.

A toy poodle jumps over a crossbar during the Super Dogs Carnival in Tokorozawa, north of Tokyo.

Gorillas Kazi, left, and Kali ride the back of their mother, Kuchi, on twins' first birthday at Zoo Atlanta. Kali and Kazi are the only gorilla twins in the world born in captivity to be raised solely by their mother.

Yulka, a beluga whale, swims with her day-old baby at the Oceanographic Institute in Valencia, Spain.

A cat rests its eyes during a cat show in Russia's southern city of Stavropol.