A small eurasian lynx (Lynx Lynx), the youngest offspring of the Lodz Zoo, born in May 2015, is seen in his enclosure in Lodz Zoo in Lodz, Poland, August 21, 2015. It was his first public appearance since his birth. (Photo by Grzegorz Michalowski/EPA)

Rotem, a sand cat, is pictured with her three kittens at the Safari in Ramat Gan, near Tel Aviv, August 18, 2015. Rotem gave birth to her kittens three weeks ago. The species is listed as near threatened and extinct from Israel, according to the zoo's staff. (Photo by Baz Ratner/Reuters)

Three sand cat kittens look out of their den at the Safari in Ramat Gan, near Tel Aviv, August 18, 2015. (Photo by Baz Ratner/Reuters)

Rotem, a Sand Cat, is pictured with her three cubs at the Safari in Ramat Gan, near Tel Aviv, August 18, 2015. (Photo by Baz Ratner/Reuters)

Visitors and employees are reflected on the window as they watch Anfisa (R), a 10-year-old female chimpanzee, and a male chimpanzee named Tikhon playing at the Royev Ruchey zoo in the Siebrian city of Krasnoyarsk, Russia, August 20, 2015. (Photo by Ilya Naymushin/Reuters)

Giant panda cubs are seen inside baskets during their debut appearance to visitors at a giant panda breeding centre in Ya'an, Sichuan province, China, August 21, 2015. A total of 10 giant panda cubs that were born in the centre this year, aging from one week to two months, met visitors for the first time on Friday, local media reported. (Photo by Reuters/Stringer)

A researcher places a giant panda cub inside an incubator during its debut appearance to visitors at a giant panda breeding centre in Ya'an, Sichuan province, China, August 21, 2015. (Photo by Reuters/Stringer)

A researcher moves giant panda cubs on blankets during their debut appearance to visitors at a giant panda breeding centre in Ya'an, Sichuan province, China, August 21, 2015. (Photo by Reuters/Stringer)

People look through a window as giant panda cubs lie inside baskets during their debut appearance to visitors at a giant panda breeding centre in Ya'an, Sichuan province, China, August 21, 2015. (Photo by Reuters/Stringer)

Researchers place a giant panda cub into a basket during its debut appearance to visitors at a giant panda breeding centre in Ya'an, Sichuan province, China, August 21, 2015. (Photo by Reuters/Stringer)

A giant panda cub is pictured in an incubator at the Ya'an Bifengxia Giant Panda Breeding and Research Center in Ya'an city, southwest China's Sichuan province, 21 August 2015. Ten tiny panda cubs made their first public appearance at China's Ya'an Bifengxia Giant Panda Breeding and Research Center in southwestern Sichuan province on Friday (21 August 2015). All of the ten giant pandas were born in 2015. The oldest of them is just two month old, while the youngest one was born a week ago. This marks the first time they were put together as a group since they were born. (Photo by Imaginechina/Splash News)

A giant panda cub is pictured in an incubator at the Ya'an Bifengxia Giant Panda Breeding and Research Center in Ya'an city, southwest China's Sichuan province, 21 August 2015. (Photo by Imaginechina/Splash News)

Meerkat babies look out of a hole in their enclosure at the zoo in Erfurt, Germany, Monday, August 10, 2015. The babies were born on July 17, 2015. (Photo by Jens Meyer/AP Photo)

A handout picture dated on 28 January 2015 and released on 13 August 2015 by the Grupo Boticario Foundation in Serra do Quiriri, part of the southern state of Santa Catarina, Brazil. A group of Brazilian researchers discovered a new species of tiny toad, which is characterized by measuring just over a centimeter and considered threatened by extinction and whose habitat is confined to a mountainous region in the southern state. Brachycephalus quiriri was discovered by the Parana Federal University (UFPR) in the Quiriri hill, Santa Catarina, said the Grupo Boticario Foundation, which sponsored the study. (Photo by Luiz Fernando Ribeiro/EPA/Grupo Boticario Foundation)

A stork searches for food in a field near Mallnow, Germany, 20 August 2015. (Photo by Patrick Pleul/EPA)

Young seals swim in their pool at the seal station in Norden, northern Germany on August 20, 2015. (Photo by Ingo Wagner/AFP Photo/DPA)

A baby Asian elephant takes her first steps into the public view at Chester Zoo, in Chester, England, Friday August 21, 2015, The female elephant calf was born on Thursday to mum Thi Hi Way, but she has not yet been named. (Photo by Peter Byrne/PA via AP Photo)

A baby aardvark next to her mother Kvida at Prague Zoo, Czech Republic, 17 August 2015. The baby aardvark is 23 days old. (Photo by Filip Singer/EPA)

An Alpaga is pictured on August 16, 2015 at the menagerie of the Jardin des Plantes botanical garden in Paris. The menagerie created in 1794 is one of the oldest zoos in the world. (Photo by Stephane De Sakutin/AFP Photo)

An orangutan named Pacquiao poses during a media event for the opening of a medicinal plants exhibition at the Malabon Zoo and botanical garden in suburban Manila on August 18, 2015. The Philippine Department of Health has endorsed 10 medicinal plants to be used as herbal medicine as part of its traditional health programme. (Photo by Jay Directo/AFP Photo)

A Southern Darter dragonfly (Sympetrum Meridionale) is pictured on August 19, 2015 in the Israeli Mediterranean coastal city of Netanya. (Photo by Jack Guez/AFP Photo)

Brown bears cool off in a pool at the bear sanctuary near the Badovc lake on August 19, 2015 in Badovc, during a heat wave in Kosovo. (Photo by Armend Nimani/AFP Photo)

Picture taken on August 16, 2015 showing two girls feeding a giraffe at the Autosafari Chapin open zoological park in the Guanagazapa municipality, Escuintla departament, 87 km south of Guatemala City. (Photo by Johan Ordonez/AFP Photo)

Internet Sensation Grumpy Cat and WWE Diva Natalie “Nattie” Neidhart at The Friskies Create & Taste Kitchen in New York, NY August 19, 2015. (Photo by Dave Allocca/Starpix)