Julian Assange's cat sits behind a window at Ecuador's embassy in London, Britain, February 6, 2018. (Photo by Peter Nicholls/Reuters)





This picture taken on April 10, 2019 shows a white bengal tiger hugging a wooden structure at Loofoo Village zoo in Hsinchu, northern Taiwan. (Photo by Sam Yeh/AFP Photo)





In this August 31, 2017, file photo, one of over 100 pangolins and 450 kg (992 lb.) of pangolin scales seized buy the Thailand customs, estimated to be worth over 2.5 million baht (USD $75,278), are displayed during a press conference at the Customs Department headquarters in Bangkok, Thailand. Singapore has seized a total of 25 tons of pangolin scales belonging to tens of thousands of endangered mammals in two busts in less than a week. The scales, which were en route from Nigeria to Vietnam, were found in 474 bags in a shipping container on Monday, April 8, 2019. (Photo by Sakchai Lalit/AP Photo/File)





A girl walks an Akita-inu dog dressed in a military uniform in Vladivostok, Russia on April 9, 2019. (Photo by Yuri Smityuk/TASS)





A quiscalus dips food in one of the few puddles of water in part of La Sabana Metropolitan Park lagoon, which has been affected by the droughts produced by El Niño, in San Jose, Costa Rica, 03 April 2019. Latin America said it would commit to protecting water sources and boost investments to comply with the UN Sustainable Development Goal (ODS) on water and sanitation, after the V Latin American Conference on Water and Sanitation (LATINOSAN), which ended on Wednesday in Costa Rica. (Photo by Jeffrey Arguedas/EPA/EFE)





A raccoon is seen at Raccoon's House in the town of Khotkovo near Moscow, Russia on April 6, 2019. Over 20 raccoons live here. (Photo by Sergei Bobylev/TASS)





A raccoon is seen at Raccoon's House in the town of Khotkovo near Moscow, Russia on April 6, 2019. Over 20 raccoons live here. (Photo by Sergei Bobylev/TASS)





A hoopoe bird is seen in a field in the village of Damour, south of the capital Beirut, on April 8, 2019. (Photo by Joseph Eid/AFP Photo)





Polar bears Nanuq and Vera play in their enclosure at the “Tierpark” zoo of Nuremberg, Germany, Thursday, April 11, 2019. (Photo by Daniel Karmann/dpa via AP Photo)





A facility where nearly 100 whales, including orcas and beluga, are held in cages, is seen during a visit of scientists representing explorer and founder of the Ocean Futures Society Jean-Michel Cousteau in a bay near the Sea of Japan in Primorsky Region, Russia, April 7, 2019. (Photo by Alexander Safronov/Press Service of Administration of Primorsky Krai via Reuters)





A flock of ostriches is seen at a farm on the outskirts of Havana, Cuba on April 11, 2019. (Photo by Fernando Medina/Reuters)





Swans glide over a small pond in front of the Nymphenburg Castle in Munich, southern Germany, on a warm Sunday, April 7, 2019. (Photo by Michael Probst/AP Photo)





A zookeeper interacts with a sea lion during its training aimed at making medical interventions easier at the Vincennes zoological gardens (Parc zoologique de Vincennes) in Paris on April 4, 2019. The zoo of Paris will celebrate five years since its reopening on April 12, 2019. (Photo by Philippe Lopez/AFP Photo)





A zookeeper interacts with a sea lion during its training aimed at making medical interventions easier at the Vincennes zoological gardens (Parc zoologique de Vincennes) in Paris on April 4, 2019. The zoo of Paris will celebrate five years since its reopening on April 12, 2019. (Photo by Philippe Lopez/AFP Photo)





Deer stand on a field near Hildesheim, Germany, early Wednesday morning, April 10, 2019. (Photo by Moritz Frankenberg/dpa via AP Photo)





A giant panda cub enjoys the spring sunshine at the China Conservation and Research Center for the Giant Panda on April 6, 2019 in Chengdu, Sichuan Province of China. (Photo by An Yuan/China News Service/VCG via Getty Images)





An Indian White tigress cools down in a pond in her enclosure to beat the heat, at the Kamla Nehru Zoological Garden, in Ahmedabad on April 11, 2019. (Photo by Sam Panthaky/AFP Photo)