Giant panda Weiwei leans on ice blocks to cool off inside its enclosure at a zoo in Wuhan, Hubei province, China, August 4, 2015. Local temperatures hit 36 degrees Celsius (96.8 degrees Fahrenheit) on Tuesday. (Photo by Reuters/Stringer)

A zoo keeper holds three young beavers in Wuppertal Zoo, Germany, July 31, 2015. (Photo by Oliver Berg/EPA)

A male orangutan rests on a dock while a tourist boat waits at Camp Leakey in Tanjung Puting National Park in Central Kalimantan province, Indonesia in this June 16, 2015 file photo. The endangered orangutan is a solitary animal and it is rare to sight these great apes in groups, but this is Camp Leakey in the Tanjung Puting National Park in Indonesia and home to around 6,000 rescued orangutans. The park in Borneo's central Kalimantan has been protecting great apes for 38 years but its success is now a problem as the reserve does not have sufficient space and resources to sustain any more apes. (Photo by Darren Whiteside/Reuters)

A male orangutan waits near a feeding station at Camp Leakey in Tanjung Puting National Park in Central Kalimantan province, Indonesia in this June 15, 2015 file photo. (Photo by Darren Whiteside/Reuters)

Five-years-old white African lions Almaz (R) and Agata pull a rope as they play with employees at the Royev Ruchey Zoo on the suburbs of the Siberian city of Krasnoyarsk, Russia, August 1, 2015. The game is a part of the entertaiment program for visitors of the zoo called “Summer evenings” during which they have an opportunity to watch an evening activity of animals, local media reported. (Photo by Ilya Naymushin/Reuters)

Five-years-old white African lions Almaz (R) and Agata pull a rope as they play with employees at the Royev Ruchey Zoo in the suburbs of the Siberian city of Krasnoyarsk, Russia, August 1, 2015. (Photo by Ilya Naymushin/Reuters)

Khan, a five-year-old male Bengali White Tiger, participates in his training session with a piece of meat inside an open-air cage at the Royev Ruchey Zoo on the suburbs of the Siberian city of Krasnoyarsk, Russia, August 1, 2015. Zookeepers train Khan using meat suspended on a chain so that the tiger will not lose motor and mental skills associated with hunting, an official representative of the zoo said. (Photo by Ilya Naymushin/Reuters)

A Ring Tail lemur sits on a leaf at the Lemurs Park, a private eco-tourism enterprise which hosts nine species, near Antananarivo Madagascar in this December 5, 2006 file photo. Perched on the muddy bank of a river meandering through rolling green hills, the Lemurs' Park near Madagascar's capital is rated one of the city's top attractions, but you would not know it from the number of visitors. (Photo by Radu Sigheti/Reuters)

A caretaker feeds lemurs at Antananarivo's Tsimbazaza Zoo in Madagascar in this December 5, 2006 file photo. (Photo by Radu Sigheti/Reuters)

Lemurs are feed by a caretaker at Antananarivo's Tsimbazaza Zoo Madagascar, in this December 5, 2006 file photo. (Photo by Radu Sigheti/Reuters)

A man washes a horse in order to cool it down to ease the effect of a heatwave at the Beirut Hippodrome, Lebanon August 4, 2015. (Photo by Mohamed Azakir/Reuters)

A guereza monkey (Colobus Guereza) holds a newborn baby at Prague Zoo, Czech Republic, August 7, 2015. The guereza monkey baby was born on July 31, according to the zoo. (Photo by David W. Cerny/Reuters)

Guereza monkeys (Colobus Guereza) hold a newborn baby at Prague Zoo, Czech Republic, August 7, 2015. (Photo by David W. Cerny/Reuters)

A flamingo and flamingo chicks are seen in a corral before being fitted with identity rings at dawn at a lagoon in the Fuente de Piedra natural reserve, in Fuente de Piedra, near Malaga, southern Spain, August 8, 2015. Around 600 flamingo chicks were tagged and measured before being placed in the lagoon, one of the largest colonies of flamingos in Europe, according to authorities of the natural reserve. (Photo by Jon Nazca/Reuters)

Pygmy Hippo Petre and her calf Obi celebrate her 31st birthday at Melbourne Zoo in Melbourne, Australia, 04 August 2015. (Photo by Tracey Nearmy/EPA)

Four-month-old fox cubs squaring up to each other in Walthamstow, England on August 7, 2015. (Photo by Greg Morgan/Barcroft Media)

This tiger cub is being raised by human and dog carers. The unnamed female cub was rejected by its mother at the Oasis of the Siberian Tiger project in Senec, Slovakia on July 30, 2015. (Photo by Ivan Ková/Rex Shutterstock)

A cat participant at the Matilda's Annual Celebration at the Algonquin Hotel on August 5, 2015 in New York City. An annual CAT fashion show benefiting NYC's animals was held at the Algonquin Hotel in New York City on Wednesday, August 5th. Furry fashionistas and their owners came together to honor New York's First Responders and members of the NYC Animal Cruelty Investigation Squad. All proceeds raised will benefit the Mayor's Alliance for NYC Animals. Costumes and clothing were provided by animal fashion designer Ada Nieves, who designed outfits inspired by the city's police and fire departments. The hotel's cat tradition dates back to the 1930s when a stray cat, later named Matilda, wandered through the hotel's doors looking for food and shelter. (Photo by Ruaridh Connellan/Barcroft Media)

A monkey sit on a tree trunk at a zoo during a hot day in Pegia village near Paphos coastal city in southwest part of the island of Cyprus, Wednesday, August 5, 2015. The highest temperature in the island was still above normal, reaching between 35C to 41C (95F to 105,8F). (Photo by Petros Karadjias/AP Photo)

A desert antelopes gallops on August 5, 2015 at the Hannover's zoo. (Photo by Susann Prautsch/AFP Photo/DPA)

Animals find own ways to cool down in scorchers at the Wuhan Zoo in Wuhan city on August 4, 2015. (Photo by Imaginechina/Splash News)

A handout image released by Taronga Zoo on 07 August 2015 shows a tiny wallaby joey at Taronga Zoo in Sydney, Australia. Two tiny wallaby joeys have poked their heads out of their mother's pouch, introducing themselves at Taronga Zoo. The zoo has welcomed the pair of baby Brush-tailed Rock-wallabies as part of a successful breeding program for endangered species. (Photo by EPA/Taronga Zoo)

Sheepdog Glenn chases a Suffolk cross sheep at the 2015 Welsh National Sheep Dog Trials at Llanvetherine in Wales, July 31, 2015. (Photo by Rebecca Naden/Reuters)

Two-toed baby sloth Edward Scissorhands yawns in this handout photograph taken at London Zoo July 24, 2015 and released July 31, 2015. When baby sloth Edward Scissorhands' mother stopped producing milk and could not care for her infant, a London zoo keeper stepped in as a replacement mother – with the help of a teddy bear from a gift shop. The two-toed, seven-week sloth, born to second-time parents Leander and Marilyn, is being hand-reared by zoo keeper Kelly-Anne Kelleher at London Zoo. (Photo by Reuters/ZSL)

This adorable baby sloth is being raised with the help of a teddy bear at London Zoo on August 5, 2015. After being rejected by its mother workers at the facility began using the cuddly toy as a surrogate parent. The sweet faced, two-toed sloth is named after Johnny Depp's role in the Edward Scissorhands movie – because of its four-inch-long claws. Eddie is being hand-reared by a zookeeper, Kelly-Anne Kelleher. “To help build up the muscles that Edward would normally use holding on to his mother, Kelly-Anne customised his sloth-teddy so that it can be hung from a branch”, said a rep from the zoo. “That allows the youngster to climb on, and strengthen his little limbs”. (Photo by ZSLLondonZoo/Splash News)

Animals find own ways to cool down in scorchers at the Wuhan Zoo in Wuhan city on August 4, 2015. (Photo by Imaginechina/Splash News)

A little red panda takes a rest on a hot summer day with temperatures up to 35 degrees Celsius (95 degrees Fahrenheit) at the zoo in Gelsenkirchen, Germany, Monday, August 3, 2015. (Photo by Martin Meissner/AP Photo)

A migratory bird searches for food at the shores off Manila Bay in Manila, Philippines Wednesday, August 5, 2015. Migratory birds usually come towards the end of the year but some opt to stay in the country as their adapted habitat. (Photo by Bullit Marquez/AP Photo)

22 year-old gorilla Kijivu cools off under a refreshing mist shower as the temperature climbs to forecasted record highs at the zoo in Prague, Czech Republic, Friday, August 7, 2015. (Photo by Petr David Josek/AP Photo)

The four month old baby octopus “Jonas” swims in the kindergarten aquarium at the 'Sea Life' aquarium in Berlin, Germany, 05 August 2015. The species “octopus vulgaris” can reach a span of up to one meter. Jonas will be featured during the general exhibition at the 'Sea Life' aquarium in the next few weeks. (Photo by Jens Kalaene/EPA)

A sloth lies in the new enclosure for exotic animals in the zoo in Karlsruhe, Germany, 29 July 2015. Around 2,000 animals from about 100 species live in the house for exotic animals. (Photo by Uli Deck/EPA)

One-week-old orangutan Dalai lies at its mother Daisy in their enclosure in the zoo Dresden, eastern Germany, on July 30, 2015. (Photo by Arno Burgi/AFP Photo/DPA)

A seagull eats takeaway food left on the harbourside at St Ives, July 28, 2015 in Cornwall, England. (Photo by Matt Cardy/Getty Images)

Two-year old Indian elephant calf Asha enjoys a cool bath in the Budapest Zoo as the daytime temperature is above 34 centigrades in Budapest, Hungary, 07 Augustus 2015. (Photo by Attila Kovacs/EPA)

Animals find own ways to cool down in scorchers at the Wuhan Zoo in Wuhan city on August 4, 2015. (Photo by Imaginechina/Splash News)