Macaques cool off in showers at the Wulongkou scenic resort as a heatwave hits eastern China in Jiyuan on August 3, 2017. (Photo by SIPA Asia/Rex Features/Shutterstock)





A striated heron catches a fish with its beak on the Wangsuk stream in Guri, Gyeonggi province, South Korea, 01 August 2017. (Photo by Jeon Heon-Kyun/EPA)





Two sheep fight in a competition in Zhangjiakou, Hebei province, China on August 1, 2017. (Photo by Reuters/China Stringer Network)





Cheetah cubs play in their acclimatization enclosure at the Zoo in Prague, Czech Republic, 31 July 2017. The animals, two females and three males, were born on 15 May 2017. (Photo by Martin Divisek/EPA)





One of the newly born cheetah quintuplets is licked by its mother Savannah at their enclosure at the zoo in Prague, Czech Republic, Thursday, August 3, 2017. The five cubs, three male and two female, were born on May 15, 2017. Scientists say every cheetah cub is critical to saving the species, which is threatened with extinction in the wild. (Photo by Petr David Josek/AP Photo)





Three of the newly born cheetah quintuplets rest at their enclosure with their mother Savannah at the zoo in Prague, Czech Republic, Thursday, August 3, 2017. (Photo by Petr David Josek/AP Photo)





One of the newly born cheetah quintuplets plays with its mother Savannah at their enclosure at the zoo in Prague, Czech Republic, Thursday, August 3, 2017. (Photo by Petr David Josek/AP Photo)





Three of the newly born cheetah quintuplets rest at their enclosure at the zoo in Prague, Czech Republic, Thursday, August 3, 2017. (Photo by Petr David Josek/AP Photo)





One of the newly born cheetah quintuplets plays with its mother Savannah at their enclosure at the zoo in Prague, Czech Republic, Thursday, August 3, 2017. (Photo by Petr David Josek/AP Photo)





Female Siberian tiger “Maruschka” and two of her babies explore the enclosure in the zoo “Hagenbeck” in Hamburg, Germany, Thursday, August 3, 3017. “Maruschka” gave birth to four tiger cubs on June 15, 2017. (Photo by Christian Charisius/DPA via AP Photo)





In this photo taken on Sunday, July 30, 2017, a bear gets a water spray shower to beat the heat in a private Zoo in Basra, 340 miles (550 kilometers) southeast of Baghdad, Iraq. Iraq's weather service warned Thursday that temperatures will increase next week in most parts of the country, with the highs expected to reach 51 degrees Celsius, or about 124 degrees Fahrenheit, adding to the daily woes of Iraqi citizens already facing a deteriorated security situation and lack of public services. (Photo by Nabil al-Jurani/AP Photo)





A polar bear enjoys a patch of artificial snow at Moscow zoo on August 3, 2017. (Photo by Mladen Antonov/AFP Photo)





Zebras standing lined up in a shelter at the Zoo in Augsburg, Germany, 02 August 2017. (Photo by Karl- Josef Hildenbrand/DPA)





A lion's mane jellyfish (Cyanea capillata) is seen in the water off the island of Lindoya in the Oslo fjord on August 4, 2017. It is the largest known species of jellyfish an its range is confined to cold, boreal waters of the Arctic, northern Atlantic, and northern Pacific Oceans. It uses it's stinging tentacles to capture, pull in and eat prey such as fish and other sea creatures. (Photo by Odd Andersen/AFP Photo)





A Secretary bird rolls its eyes back as it squawks at the World of Birds Wildlife Sanctuary in Cape Town, South Africa, 02 August 2017. Located in the picturesque valley of Hout Bay the World of Birds is the largest bird park in Africa. Over 3,000 birds of 400 different species are uniquely presented in over 100 spacious landscaped aviaries where visitors are able to walk through allowing intimate closeness with the birds. The park is one of Cape Town's premier tourist attractions accomodating over 100,000 visitors annually. Created by Walter Mangold in 1973 the sanctuary cares for all kinds of injured and sick birds and small animals. With a no kill policy every creature is taken care of on a daily basis by the 40 permanent staff members. (Photo by Nic Bothma/EPA)





Eastern grey kangaroos fight on “Look At Me Now Headland” at Emerald Beach in northern New South Wales, Australia, 02 August 2017. (Photo by Dave Hunt/EPA)