Ukrainian circus artist Vladislav Goncharov performs with one of his male lions during the dress rehearsal of the International Circus Festival in Budapest January 21, 2010. Credit: REUTERS/Laszlo Balogh


Female gorilla N'Yaounda holds her nine-day-old baby gorilla at Budapest Zoo January 14, 2010. Credit: REUTERS/Laszlo Balogh


A mother carrying her baby (in reflection) watches pandas play at the Shanghai zoo where they are being unveiled to the public for the first time ahead of the 100-day countdown to the Shanghai World Expo January 20, 2010. Credit: REUTERS/Aly Song


A baby Kirk's Dik Dik antelope is fed milk in the office of Chester Zoo's curator of mammals Tim Rowlands, northern England, January 22, 2010. Credit: REUTERS/Phil Noble


Lion cubs rest upon their arrival at the Riyadh zoo January 17, 2010. The two cubs were discovered in a wooden box during a customs operation against the illegal commerce of wild animals in the northern city of Hadieth. Credit: REUTERS/Fahad Shadeed


A tiger jumps through a ring of fire at the Sriracha Tiger Zoo in Thailand's Chonburi Province, nearly 100 km (62 miles) east of Bangkok January 26, 2010. Credit: REUTERS/Sukree Sukplang


A dog stands on the back of a sea lion during the opening ceremony of the 34th Monte-Carlo International Circus Festival of Monte Carlo in Monaco January 14, 2010. Credit: REUTERS/Lionel Cironneau/Pool


One-year-old twin polar bears Ikor and Kiroru play at Sapporo Maruyama Zoo in Sapporo, northern Japan, January 18, 2010. Credit: REUTERS/Issei Kato


Two American Flamingos are seen in their enclosure at Sapporo Maruyama Zoo in northern Japan January 18, 2010. Credit: REUTERS/Issei Kato