White rhinoceros calf Naruna explores with its mother in its enclosure at the Serengeti Park in Hodenhagen, Germany. Naruna was born at the park on Nov. 22, 2008. (Nigel Treblin / AFP/Getty Images)
In Switzerland, Indian lion cubs Jeevana, left, and Jasraj pad about in their outdoor enclosure at Zurich’s zoo for the first time. (Patrick B. Kraemer / AP/Keystone)
An arctic fox is released into its new residence at Rotterdam Zoo. The zoo organization is starting a campaign to raise awareness of the threat to predators such as the arctic fox. (Valerie Kuypers / AFP/Getty Images)
Charlie, a male Sumatran orangutan, lazes next to a palm leaf on at the Singapore Zoo. (Wong Maye-E / Associated Press)
The sun warms infant gorilla Kiburi as she dozes on the back of her mom, Safiri, at the zoo in Duisburg, Germany. (Martin Meissner / Associated Press)
An ostrich eats a roll at the Serengeti Park in Germany’s Hodenhagen zoo. (Nigel Treblin / AFP/Getty Images)
A recently hatched duckling climbs out of a pond at the Slimbridge Wetlands Wildlfire Center near Dursley, England. After a particularly harsh winter, many species of bird are beginning to hatch at the wildlife center in Slimbridge, which is home to an array of wildlife including large collections of swans, geese and ducks. (Matt Cardy / Getty Images)
Young elephants Tamo and Tika play at the Wuppertal Zoo in Germany. (Christof Koepsel / Getty Images)
A fake fin keeps Allison from swimming in circles. The rescued green sea turtle, at Sea Turtle Inc. on Texas’ South Padre Island, has only one flipper but swims with the aid of a fin attached with neoprene. (Eric Gay / Associated Press)
