A tiger cools off in water at a zoo in Huangshan, Anhui province, China, July 25, 2016. (Photo by Reuters/Stringer)





In this July 19, 2016, image provided by the Romanian Ornithological Society, a rare bearded vulture flies near Baia-Mare, Romania, the first time the rare bone-eating bird has been spotted here in more than 80 years. The bird, called Adonis, was born in captivity in the Czech Republic in 2014, in a European breeding program. (Photo by Sebastian Bugariu/Romanian Ornithological Society via AP Photo)





Red pandas take food as they sit on and walk abound chunks of ice during a hot summer day in Wuhan, Hubei Province, China, July 26, 2016. (Photo by Reuters/China Daily)





A pigeon flaps its wings to shake off water droplets near a water trough in Valletta, Malta, July 25, 2016. (Photo by Darrin Zammit Lupi/Reuters)





A tiger is returned to its enclosure at the Wildlife Waystation after animals were evacuated during the approach of the Sand Fire in the Sylmar area of Los Angeles, California, U.S. July 27, 2016. (Photo by David McNew/Reuters)





A polar bear is seen in an aquarium at the Grandview mall in Guangzhou, Guangdong province, China, July 27, 2016. (Photo by Reuters/Stringer)





A polar bear is seen in an aquarium at the Grandview mall in Guangzhou, Guangdong province, China, July 27, 2016. (Photo by Reuters/Stringer)





Two dogs ride on a horse during a display by the entertainer Santi Serra on day five of the Dublin horse show in Ireland on July 24, 2016. (Photo by Niall Carson/PA Wire)





Giant panda triplets Mengmeng, Shuaishuai and Kuku eat bamboo shoots and carrots at their second birthday party in Guangzhou, China on July 28, 2016. (Photo by Xinhua/Rex Features/Shutterstock)





A yellow-bellied glider joey finds a surrogate mum after surviving a collision with a barbed-wire fence in Taronga zoo, Australia on July 29, 2016. (Photo by Taronga Zoo/Rex Features/Shutterstock)





A giant panda lies on an ice block to cool down at Wuhan zoo, China on July 25, 2016. (Photo by ImagineChina/Rex Features/Shutterstock)





A giant panda takes its food as it holds a chunk of ice during a hot summer day in Wuhan, Hubei Province, China, July 26, 2016. (Photo by Reuters/China Daily)





A brown bear waits for food at the zoo in Madrid, Spain on July 30, 2016. (Photo by Jorge Sanz/Pacific Press/SIPA Press/Rex Features/Shutterstock)





This October 1, 2014, file photo shows a black-footed ferret peeking out of a tube after being brought to a ranch near Williams, Ariz. The endangered weasel is returning to an area of western Wyoming where the critter almost went extinct more than 30 years ago. Biologists plan to release 35 black-footed ferrets Tuesday, July 26, 2016, near Meeteetse, Wyo. Scientists thought the black-footed ferret was extinct until a dog brought a dead one home near Meeteetse in 1981. (Photo by Felicia Fonseca/AP Photo)





A pair of one-horned Rhinoceros wade through flood waters at the Pobitora Wildlife Sanctuary that was flooded following heavy monsoon rains at Pobitora, east of Gauhati, Assam state, India, Sunday, July 24, 2016. Assam is home to the world's largest population of the rare rhinos. Monsoon season in India begins in June and ends in October. (Photo by Anupam Nath/AP Photo)





The rescued white-tailed eagle, which was fighting for his life in the muddy slime, near the nature reserve Karsiborskie Ferns, on the island of Usedom on the Szczecin Lagoon, Poland, 26 July 2016. (Photo by Marcin Bielecki/EPA)





Photo taken on July 26, 2016 shows a red panda at Zoological Gardens in Yangon, Myanmar. The Yangon Zoological Gardens (Yangon Zoo) is the oldest and the second largest zoo in Myanmar which was established in 1901. It is located immediately north of downtown Yangon near Kandawgyi Lake. The 70-acre recreational park also includes a museum of natural history, an aquarium and an amusement park. It has 150 species of wildlife, consisting 60 species of mammals, 70 species of birds and 20 species of reptiles. The zoo was operated by the Forest Department under the Ministry of Forestry until April 2011, and is now operated by a private firm. (Photo by U Aung/Xinhua via ZUMA Wire)





A one-horned rhino swims through flood waters in Kaziranga National Park, about 250 kilometers east of Guwahati, on July 27, 2016. Vast tracts of the park, home to the rare one-horned rhino, were under water following heavy monsoon rains. (Photo by AFP Photo)





An elephant is fed with frozen food to beat the summer heat at the Bioparc zoo in Valencia on July 23, 2016. (Photo by Jose Jordan/AFP Photo)





A chimpanzee is fed with frozen food to beat the summer heat at the Bioparc zoo in Valencia on July 23, 2016. (Photo by Jose Jordan/AFP Photo)





A Sumatran Tiger called Indrah climbs a tree in its enclosure at the Melbourne Zoo in Melbourne, Australia, 29 July, 2016. Only around 350 Sumatran Tigers remain in the wild due to deforestation. International Tiger Day is celebrated on 29 July to raise awareness of endangered tiger species. (Photo by Tracey Nearmy/EPA)





Macaques enjoy their feast made of over 4000kg fruits in Jiyuan, China on July 24, 2016. (Photo by Wd/ZUMA Press/Splash News)





Officers Centre of Orangutan Protection (COP) and the Jakarta Animal Aid Network (JAAN) see a cage with a baby Sumatran orangutan (Pongo abelii) seized from captivity property of citizens, as they are saved to be rehabilitated while being transported to Medan on July 27, 2016, Indonesia. Sumatran orangutan conservation rescue teams Centre for Orangutan Protection (COP) and the Jakarta Animal Aid Network. (Photo by Ivan Damanik/ZUMA Press/Splash News)





A handout picture released by the Taipei Zoo shows a Bengal tiger licking an “iced cake” made with ice and meat at the Taipei Zoo in Taipei, Taiwan, 27 July 2016. On 27 July, temperature in Taipei reached nearly 39-degree Celsius, the second highest in Taipei's history. The Tiapei Zoo made iced cakes with meat and fruits for large animals to help them cope with the hot weather. (Photo by EPA/Taipei Zoo)





A undated handout picture provided by the Wildlife Conservation Society on 29 July 2016 shows the first fairy penguin to hatch in the 120-year history of the zoo, at the Bronx Zoo, New York, USA. The chick hatched May 10, 2016. (Photo by Julie Larsen Maher/EPA/Wildlife Conservation Society)