Antarctica: Penguins play at Chile's military base Presidente Eduardo Frei, in the King George Island, in Antarctica.
United States: Turtles sunbathing on a log at the Smithsonian's National Zoo in Washington, DC.
Uruguay: A fur seal pup is seen on top of its mother at Isla de Lobos.
Greece: Four month old lion cubs play at their enclosure at the Attica Zoological Park in Spata, east of Athens.
Germany: A Gentoo penguin swims through its basin at the Tierpark Hellabrunn zoo in Munich, southern Germany.
Indonesia: A Wreathed Hornbill, also known as the Bar-pouched Wreathed Hornbill, in Aceh.
Germany: The 14-week-old polar bear twins play with their mother in their enclosure during the first outside excursion in the zoo in Munich Hellabrunn, southern Germany.
Colombia: A duck seen in a river in Medellin, Colombia.
Bangladesh: Fisherman feed their otters as they catch fish in Narail, near Dhaka. The fishermen are using a rare technique that relies on coordination between man and trained otters, a centuries-old fishing partnership that has already long died out in other parts of Asia.
China: Man posing with two Tibetan mastiffs after they were sold at a "luxury pet" fair in Hangzhou, in eastern China's Zhejiang province. One of the Tibetan mastiff puppies (L) was sold for almost two million USD, the most expensive dog sale ever.
Germany: A Siberian tiger at the Tierpark Hellabrunn zoo in Munich, southern Germany.