A monkey sits on an idol of Buddha during celebrations on the birth anniversary of Buddha, also known as Vesak Day, in Kathmandu, Nepal, May 21, 2016. (Photo by Navesh Chitrakar/Reuters)





Lions cause a roadblock for tourists visiting the Kruger National Park in South Africa on May 13, 2016. (Photo by Elsa de Kock/Greatstock/Barcroft Images)





In this May 15, 2016 picture two pelicans tussle in an enclosure at the bird park in Walsrode, Germany. (Photo by Daniel Reinhardt/DPA via AP Photo)





Moccas, a one year-old Andean Condor stretches his wings in the sunshine at the ICBP (International Centre for Birds of Prey) on May 16, 2016 in Newent, England. The ICBP is the oldest dedicated birds of prey centre in the world. Around 75 different species of birds of prey are looked after at the facilities in the Gloucestershire countryside, including Hawks, Eagles, Owls and Falcons from across the world. As well as accepting, treating and rehabilitating injured wild birds of prey from the UK, the centre runs a captive breeding programme, working in close partnership with the RSPB, (Royal Society for the Protection of Birds) and ZSL (Zoological society London) Vulpro, Green Balkans and BNHS (Bombay Natural History Society) to help protect and sustain healthy populations of endangered and threatened species in their native countries. The ICBP is one of the few places in the world that have successfully bred Andean Condors, one of the world's largest flying bird and one that is endangered in it's native South America. The Centre undertakes international conservation programmes, including working with “SAVE” (Saving Asia's Vultures from Extinction) the “South Asian Vulture Programme” which it has been involved in since 1999. (Photo by Dan Kitwood/Getty Images)





Burrowing Owl chicks are lined up to be fed at the ICBP (International Centre for Birds of Prey) on May 16, 2016 in Newent, England. (Photo by Dan Kitwood/Getty Images)





A squirrel eats a walnut at the Schoenbrunn Palace Park, in Vienna, Austria, 16 May 2016. (Photo by Lisi Niesner/EPA)





A squirrel carries a walnut at the Schoenbrunn Palace Park, in Vienna, Austria, 16 May 2016. (Photo by Lisi Niesner/EPA)





A monkey drinks water from a tap on a hot afternoon in Jammu, the winter capital Kashmir, India, 17 May 2016. Temperatures of around 42 degrees Celsius were forecast in the region. According to the news reports the Indian government decided to divert water by its river interlinking plans from rivers like Brahmaputra and the Ganges towards those rivers facing the drought likesituation . Many Indian states have been affected by drought and have been hit hard by water scarcity. (Photo by Jaipal Singh/EPA)





Two cubs of a very rare white Indian tiger, born on February 25, 2016 in Liberec Zoo, Czech Republic, were vaccinated, weighed and obtained chips during a veterinary examination on May 16, 2016. (Photo by Radek Petrasek/CTK via ZUMA Press)





A gull rests on a driftwood on a pond at a forest near the village of Svisloch, 30 km (19 miles) east of Belarus capital Minsk, Tuesday, May 17, 2016, as spring weather is established across Belarus. (Photo by Sergei Grits/AP Photo)





A flamingo sitting in the fur of the mother is pictured in the zoo in Munich, southern Germany, on May 20, 2016. Pink and red flamingos are among the largest flamingo species. A flamingo chicks hatch after 28 to 32 days from the egg. Then it will be cared for by parents. After half a year Flamingos are already grown. (Photo by Christof Stache/AFP Photo)





A lioness cools off by licking a slab of ice, during hot weather, at a zoo, in Lahore, Pakistan, Monday, May 16, 2016. Many cities in Pakistan are facing heat wave conditions. (Photo by K.M. Chaudary/AP Photo)





In this February 13, 2015 photo provided by the San Diego Zoo Safari Park, a four-week-old male okapi calf explores his outdoor habitat for the first time at the Park in Escondido, Calif. The young okapi, the 41st born at the Park and named Amaranta, previously had been spending time in the okapi barn and outside yard, but after showing signs of curiosity, staff provided the calf and his mother, Makini, access to the main forested habitat, which is viewable by guests. The okapi, a relative of the giraffe, is native to rain forests of central Africa. The Safari Park has taken a leadership role in conservation awareness through its ongoing support of the Okapi Conservation Project, which provides wildlife protection, alternative agriculture methods and community assistance in the Democratic Republic of Congo. (Photo by AP Photo/San Diego Zoo Safari Park)





A handout photograph made available by the police in Goyang, northwest of Seoul, on 17 May 2016, shows two endangered common marmosets seized from a South Korean smuggler. Native only to east-central Brazil, common marmosets are very small monkeys with relatively long tails. Police say a common marmoset is sold for 7.5 million won or 6,390 US dollars as a pet in South Korea. (Photo by EPA/Goyang Police)





Bullet, a bison, walks through the hallway of her owner Karen Schoeve's home in Argyle, Texas on Friday, May 13, 2016. Bullet the bison was transported Saturday, May 14, 2016, from Schoeve's home in Argyle to her new home, a pasture which she will share with two cows, 15 miles away in Flower Mound. (Photo by Vernon Bryant/The Dallas Morning News via AP Photo)





Bullet looks back through the hallway where she came from as she steps in the bedroom of her owner Karen Schoeve's home in Argyle, Texas on Friday, May 13, 2016. (Photo by Vernon Bryant/The Dallas Morning News via AP Photo)





Bullet walks through the hallway of her owner Karen Schoeve's home in Argyle, Texas on Friday, May 13, 2016. (Photo by Vernon Bryant/The Dallas Morning News via AP Photo)





Young wildcats (Felis silvestris) in the enclosure in Wroclaw Zoo in Wroclaw, Poland, 16 May 2016. Three European wildcats were born six weeks ago at the Zoo in Wroclaw. These predatory mammals are subject to strict species protection in Poland. (Photo by Maciej Kulczynski/EPA)





A mixed breed dog suffering from Diarrhea waits for treatment at the Mdzananda Animal Clinic in Khayelitsha, Cape Town, South Africa, 27 April 2016. Mdzananda Animal Clinic in Khayelitsha which has been serving animals and their community for twenty years is in the midst of a campaign to provide medical treatment to 12,000 animals. Animal abuse and neglect are a part of everyday life in townships across South Africa with some of the poorest communities in Khayelitsha being home to the most vulnerable animals in the greater Cape Flats area. (Photo by Nic Bothma/EPA)