Flamingos at the Zoo Aquarium in Madrid on April 9.
Twin polar bear cubs Nela and Nobby and their mother Giovanna play outside their enclosure at Tierpark Hellabrunn zoo in Munich on April 10.
Vultures at the Paris Zoological Park in the Bois de Vincennes in Paris on April 8. Inaugurated in 1934, the Paris Zoo will reopen for the public on April 12, 2014 after four years of being closed for renovation.
A flapjack octopus swims in its darkened tank for the upcoming "Tentacles: The Astounding Lives of Octopuses, Squid and Cuttlefishes" exhibition at the Monterey Bay Aquarium in Monterey, Calif., on April 8.
A brown bear cub eats an apple with its mother in their enclosure at JuraParc, Switzerland on April 7.
A ring-tailed lemur from Madagascar looks at the camera as the group is shown for the first time outside the enclosure in Avifauna Bird Park in Alphen aan den Rijn, Netherlands on April 9. The park remains the first and largest bird park in the Netherlands, but has added other animals to its unique collection.
An emu looks at a football in his enclosure at the Serengeti Park in Hodenhagen, Germany on April 13.
A rabbit sits in a field near Niederdorfelden, Germany on April 7.
A newly-hatched blackbird chick opens its beak alongside three other eggs in a nest in Frankfurt am Main, Germany on April 13.
Two brown-headed spider monkeys at the zoo in Antwerp, Belgium on April 10.
A squirrel eats a piece of cracker dropped by a tourist at the north fence of the White House in D.C. on April 11.
Brown bear Mascha and her cubs peek out a cave at Hagenbeck zoo in Hamburg, Germany on April 11.
Seven-month-old giant panda Xing Bao explores its new enclosure at the Zoo Aquarium in Madrid on April 9.
Geese walk through a park in Munich, Germany, on April 9.
A group of injured and orphaned baby wallabies are seen snuggled up in homemade pouches in New South Wales, Australia on April 8.