
A lioness and a cub cool down in a shade at Belgrade's zoo July 13, 2011 as an intense heat wave sweeps Serbia reaching 40 degrees Celsius

One of the two baby snow leopards Fala looks into the camera as they make their debut at the zoo in Warsaw, Poland, on Monday, July 18, 2011. The cats were rejected by their mother after they were born in May and are being fed and otherwise cared for by zoo employees. On Monday they took their first walk outdoors

A Pug dog rests on a container at the 2011 Taipei Pet Show inside the Nangang Exhibition Hall in Taipei July 15, 2011. The show will run from Friday to July 18 and has about 130 exhibitors and 600 booths this year

Malee, a three-month old Asian elephant, cools off with a spray of water in her wading pool at the Oklahoma City Zoo in Oklahoma City, Monday, July 18, 2011. Much of the nation is in the grip of a broiling heat wave

In this July 2011 photo released by Conservation International, an adult female northern white-cheeked crested gibbon, right, carries its baby as an adult male sits nearby at Pu Mat National Park, Nghe An province in Vietnam. About 455 northern white-cheeked crested gibbons were discovered in the National Park during a survey by the wildlife group Conservation International. The group is the largest known remaining population of the critically endangered primate

This July 1, 2011 photo shows young pelicans on Gaillard Island in Mobile Bay, Ala., at the midpoint of the first nesting season since the BP oil spill

A Python regius devours a mouse in a private residence in Los Angeles, California on July 6, 2011. This snake is a nonvenomous python species found in Africa, the smallest of the African pythons, popular in the pet trade. They are also known as royal pythons or ball pythons

A mother gorilla holds her baby on July 19, 2011 in the Apenheul zoo in Apeldoorn. A baby shower was organised by the zoo because five gorilla babies were born there in the last year

A baby Sumatran tiger (Panthera tigris sumatrae) plays on Frankfurt Zoo.

A man poses on his horse during a show at the Czech Wild West theme park in Boskovice, central Moravia

A picture taken on July 8, 2011 displays a two-head Albino California Kingsnake at the terrarium of "Skazka" (Fairy tale) Zoo in the Crimean city of Yalta. The snake will be on display at the zoo until mid-September

Two three-month-old Crowned lemurs (Eulemur coronatus) lay on their mother's back as it jumps in their enclosure on July 8, 2011 at the zoo in Mulhouse, northeastern France. Every year there are about 250 to 350 births at the Mulhouse zoo. Some young animals, once weaned, can be introduced in protected zones of their original region. If not, they go to other zoos to make up other families. Genetic mixing is necessary for the animals' health and the survival of the species

A Siberian tiger (Panthere tiger altaica) mother Niva faces one of her newborns at the Budapest Zoo and Botanic Garden in the Hungarian capital on July 4, 2011. Three eight-week-old Siberian tigers, Virgil, Thrax and Manu, were presented to the press for the first time with their health checkups and ID chips implanted by the chief doctor of the zoo

'Luk Chai', the calf of two Bangkok street elephants which arrived from Thailand in 2006, kicks a giant soccer ball during his second birthday celebrations at Taronga Zoo in Sydney on July 4, 2011. The 830kg infant was the first Asian elephant to be born in Australia and is considered to be a milestone in the zoo's Asian Elephant Conservation Program

Two baby cheetahs play in their enclosure at the zoo in Wuppertal, western Germany, on July 14, 2011. The animals were born on May 10, 2011 at the zoo

A baby rhesus macaque monkey looks out from the arms of its mother in Hong Kong on July 17, 2011. Released in the First World War during construction of the Kowloon reservoir, it was hoped that the monkeys would eat poisonous alkaloid plants surrounding the water which would otherwise contaminate the supply for humans. However, the poisonous strychnos plant is a natural food of the macaque, and the species is now widespread throughout the territory
Two grizzly bear cubs play in their new home at the Cleveland Metroparks Zoo Thursday, July 14, 2011, in Cleveland. The two males, now four months old, were orphaned earlier in the year when a man shot their mother in self-defense near Helena, Mont. (AP Photo/Mark Duncan)

Frill-necked Lizards are presented at natural history museum in the southern German city of Karlsruhe on July 8, 2011. Frill-necked Lizards are found mainly in northern Australia and southern New Guinea. AFP PHOTO / ULI DECK

A chimpanzee (Pan troglodytes) at the zoo in Basel(Zolli).Photo: Winfried Rothermel / DAPD

Four lion cubs sit in a wicker basket on Thursday, May 19, 2011 at the Hagenbeck Zoo in Hamburg, Germany. These two male and two female lion babies, born on March 31, 2011 are named Bandele, Batou, Naledi and Sakina. (AP Photo/dapd/Axel Heimken)

In this undated photo provided by the Oregon Zoo, eight-day-old caracal kittens near the den room at Predators of the Serengeti at the Oregon Zoo in Portland. The litter consists of two females and one male, left. (AP Photo/Oregon Zoo, Michael Durham)

In this photo made available by Rome Bioparco Foundation, a macaque reaches a block of frozen fruit to refresh itself, in Rome's zoo, Tuesday, July, 12, 2011. Zoo staff offered animals frozen fruit to refresh them as temperatures reached 40 Celsius (104 Farenheit) in many Italian cities. (AP Photo/Rome Bioparco Foundation)
A swallow feeds a squab on July 19, 2011 at the Schweriner See lake in Seehof, northeastern Germany. The birds are distributed all over the world and are able to aerial feeding. AFP PHOTO/JENS BUETTNER

An orangutan (Pongo pygmaeus abelii) protects himself from the cold with a blanket provided by vets at Rio de Janeiro's zoo on July 11, 2011. Vets gave blankets and hot soups to animals due to the extreme cold weather affecting Rio and the region. AFP PHOTO/VANDERLEI ALMEIDA

In this photo made available by Rome Bioparco Fundation, a lemur eats from a refrigerated watermelon to refresh itself in Rome's zoo, Tuesday, July, 12, 2011. Zoo staff offered animals frozen a nd refrigerated fruit to refresh them as temperatures reached 40 Celsius (104 Farenheit) in many Italian cities. (AP Photo/Rome Bioparco Fundation, HO)

A few days old zebra foal stands in an enclosure at the zoo in Schwerin, northern Germany, on June 27, 2011. The baby zebra was born at the zoo on June 20, 2011.JENS BUETTNER /AFP PHOTO