zoo

A seal cools off at Belgrade Zoo during a heatwave on Tuesday. In Serbia where the meteoalarm has been raised to 'red', extremely hot weather with temperatures up to 39 degrees Celsius is expected to continue over the next several days

Andrej Isakovic/AFP

A seal cools off at Belgrade Zoo during a heatwave on Tuesday. In Serbia where the meteoalarm has been raised to ‘red’, extremely hot weather with temperatures up to 39 degrees Celsius

Elephant Voi Nam grabs some apples wiht ...Elephant Voi Nam grabs some apples wiht his trunk at his enclosure at the zoo in Leipzig, eastern Germany, on May 8, 2015.     AFP PHOTO / DPA / LUKAS SCHULZE   +++   GERMANY OUTLukas Schulze/AFP/Getty Images

Lukas Schulze/AFP/DPA

Elephant Voi Nam grabs some apples with his trunk at his enclosure at the zoo in Leipzig, eastern Germany 

Ring-tailed lemurs are pictured at Zoom ...Ring-tailed lemurs are pictured at Zoom Torino, a zoological park in Cumiana near Turin, on April 22, 2015. Zoom Torino is a new immersive zoological park, where animals can be seen without bars or cages, only natural barriers ensure the visit. AFP PHOTO / MARCO BERTORELLOMARCO BERTORELLO/AFP/Getty Images

Marco Bertorello/AFP/Getty

Ring-tailed lemurs are pictured at Zoom Torino, a zoological park in Cumiana near Turin, Zoom Torino is a new immersive zoological park, where animals can be seen without bars or cages, only natural barriers ensure the visit

Penguins swim in their pool during the annual stock take at London Zoo, Monday, Jan. 5, 2015. Caring for more than 750 different species, London Zoo keepers started the New Year with the task of counting every single animal. With three Sumatran tiger cubs adding vital numbers to the European conservation breeding programme, the birth of six critically-endangered Philippine crocodiles and the arrival of nine Humboldt penguin chicks, all of the new additions will be added to the records.

Kirsty Wigglesworth/AP

Penguins swim in their pool during the annual stock take at London Zoo on Monday. Caring for more than 750 different species, London Zoo keepers started the New Year with the task of counting every single animal

Filipino zoo owner Manny Tangco kisses his Japanese koi carp inside the Malabon Zoo, north of Manila, Philippines. The zoo is one of the largest in the Philippines, borne out of a backyard hobby and passion for animals.

Dennis M. Sabangan/EPA

Zoo owner Manny Tangco kisses his Japanese koi carp at the Malabon Zoo, north of Manila, Philippines. The zoo is one of the largest in the country, created from a hobby and passion for animals.

A man cleans the teeth of a hippopotamus at a wild life reserve park in Guangzhou

Alex Lee/Reuters

A man cleans the teeth of a hippopotamus at a wild life reserve park in Guangzhou, Guangdong province in China.

In December born male zebra Jambo, left, plays with it's mother as it is enjoying the outdoor enclosure while shown to public for the first time at the Zoo in Wuppertal, Germany, Wednesday, April 16, 2014. (AP Photo/Frank Augstein)

Frank Augstein/AP

Jambo, a four-month-old zebra, plays with its mother while being shown to the public for the first time at the zoo in Wuppertal, Germany 

Lemur offspring at Eberswalder Zoo...epa04139812 A photo made available on 25 March 2014 shows a female ring-tailed lemur (Lemur catta) carrying her twin offspring at their enclosure at the zoo in Eberswalde, Germany, 24 March 2014. Several monkeys were reported to have given birth to their offspring at the zoo in the past weeks.

Patrick Pleul/EPA

A female ring-tailed lemur carrying her twin offspring at their enclosure at the zoo in Eberswalde, Germany. Several monkeys were reported to have given birth to their offspring at the zoo in the past weeks. 

Gorilla mother Kumili arms her newborn at the zoo in Leipzig, central Germany, Thursday, March 20, 2014. The baby gorilla was born during the night between 10 and 11 March 2014 and its sex is still unknown. It's the second  gorilla baby born  within four month in this monkey group. (AP Photo/Jens Meyer)

Jens Meyer/AP

Mother gorilla Kumili embrasses her newborn at the zoo in Leipzig, central German. The baby gorilla was born during the night between 10 and 11 March and its sex is still unknown. It’s the second gorilla baby born within four month in this monkey group. 

Twin polar bear cubs stand with their mother Giovanna in their enclosure at Tierpark Hellabrunn in Munich...Twin polar bear cubs stand with their mother Giovanna in their enclosure at Tierpark Hellabrunn in Munich, March 19, 2014.  The 14 week-old cubs, who made their first public appearance on Wednesday, have yet to be named.      REUTERS/Michael Dalder (GERMANY  - Tags: ANIMALS SOCIETY)

Michael Dalder/Reuters

Twin polar bear cubs stand with their mother Giovanna in their enclosure at Tierpark Hellabrunn in Munich. The 14-week-old cubs, who made their first public appearance on Wednesday, have yet to be named.

The Sumatra Orang-Utan Matra (R) holds h...The Sumatra Orang-Utan Matra (R) holds her one week old baby and smooches with her other daughter Jolie in the enclosure at the zoo Hellabrunn in Munich, southern Germany on February 7, 2014. The little Orang-Utan baby was born in the zoo on January 31, 2014 and hasn't been named yet.

Christof Stache/AFP

A Sumatran orangutan holds her one-week old baby and smooches with her other daughter Jolie in the enclosure at the Hellabrunn zoo in Munich, Germany. The baby was born on January 31 but has yet to be names 

Visitors walk through the holiday lights display "ZooLights" at the Lincoln Park Zoo in Chicago, Illinois...Visitors walk through the holiday lights display "ZooLights" at the Lincoln Park Zoo in Chicago, Illinois

Jim Young/Reuters

Visitors walk through the holiday lights display “ZooLights” at the Lincoln Park Zoo in Chicago, Illinois.

Gorillas with rugby balls

Ben Birchall/PA Wire

Komale, a Western Lowland Gorilla, inspects a rugby ball that has been placed into the enclosure at Bristol Zoo as part of its enrichment programme.

Luka, almost two-year-old male polar bear, swims in his new home at the zoo in Wuppertal, Germany. He was born in the Netherlands and is meant to be the play partner for female polar bear Anori who is the same age.

Roland Weihrauch/EPA

Luka, an almost two-year-old male polar bear, swims in his new home at the zoo in Wuppertal, Germany. Born in the Netherlands, Luka has moved to Germany to be a companion for female polar bear Anori, who is the same age.

Giraffes at the Dortmund zoo...epa03841925 A young giraffe tries to reach food with its tongue at the zoo in Dortmund, Germany, 29 August 2013. A second full grown giraffe stands next to it.  EPA/Jan-Philipp Strobel

Jan-Philipp Strobel/EPA

A young calf stands next to a full grown giraffe while trying to reach food at the zoo in Dortmund, Germany 

 An orangutan covers itself with a blanket during winter time at Rio de Janeiro Zoo in Brazil

Yasuyoshi Chibayasuyoshi/AFP/Getty Images

An orangutan covers itself with a blanket during winter time at Rio de Janeiro Zoo in Brazil

Zoo keepers Juliane Country hold a two-month-old female panda

Hendrik Schmidt/Getty Images

Zoo keepers administer prophylactic treatment to a two-month-old female panda on Thursday at the zoo in Leipzig, Germany

Elephant offspring 'Pina-Nessie' is seen together with other elephants in her enclosure at the zoo in Wuppertal, Germany, 12 August 2013. According to zoo officials, female elephant baby Pina-Nessie was born early 11 August after a European record gestation period of 674 days.

Oliver Berg/EPA

‘Pina-Nessie’ gets to know the other elephants in her enclosure at the Wuppertal zoo in Germany on Monday. According to officials, the female baby was born early on Sunday after a European record gestation period of 674 days

Two Ankole-Watusi bulls lock horns in their enclosure at the zoo in Duisburg, Germany.

Horst Ossinger/DPA/AFP

Two Ankole-Watusi bulls lock horns in their enclosure at the zoo in Duisburg, Germany.

The hamadryas baboons behave strangely at the Emmen Zoo in Emmen, inNetherlands, on July 31, 2013.  They don't eat and sit close together in a view trees and a small corner of their island. The cares can't explain their behaviour. A few years back the same group of baboons showed the similar behavior of mass apathy.

Vincence Jannink/AFP

Hamadryas baboons at the Emmen Zoo in Emmen, in the Netherlands, on Wednesday. The baboons have not eaten and sit close together in the trees and in a small corner of their island. A few years ago the same group of baboons showed a similar behaviour of mass apathy that could not be explained by their keepers.