Hope, the new polar bear cub at the Toledo Zoo, makes it's public exhibit debut Friday, May 6, 2016 in Toledo, Ohio. She was born December 3 to a 16-year-old bear named Crystal. (Photo by Dave Zapotosky/The Blade via AP Photo)





In this May 3, 2016 photo provided by the New York State Department of Environmental Conservation, a deer with its head caught in the globe from a lighting fixture over its head stands in the woods in Centereach, N.Y. The deer was able to extricate itself with the help of Environmental Conservation Officer, Jeff Hull. Hull wrestled with the deer for a while and the globe shook free in the process. (Photo by New York State Department of Environmental Conservation via AP Photo)





In this undated photo provided the American Bald Eagle Foundation, a bald eagle feeds on a salmon carcass in the Alaska Chilkat Bald Eagle Preserve outside Haines, Alaska. The preserve is about 10 miles downstream from a copper and zinc prospect that could someday be developed into a hard rock mine. Critics say a spill from mining operations could harm salmon in the rivers of the preserve, where up to 4,000 eagles gather each winter to feed on the fish after they spawn. (Photo by Cheryl McRoberts/American Bald Eagle Foundation via AP Photo)





A sheep grazes on the Isle of Lewis and Harris, an island off the northwestern tip of Scotland in the Outer Hebrides, Britain April 27, 2016. (Photo by Russell Cheyne/Reuters)





Highland cattle stand in a field on the Isle of Lewis and Harris, an island off the northwestern tip of Scotland in the Outer Hebrides, Britain April 28, 2016. (Photo by Russell Cheyne/Reuters)





A newborn male giant panda cub is seen inside an incubator at a giant panda breeding centre in Chengdu, Sichuan Province, China, May 6, 2016. (Photo by Reuters/China Daily)





A researcher looks after a giant panda cub in an incubator at a giant panda breeding centre in Chengdu, Sichuan Province, China, May 6, 2016. (Photo by Reuters/China Daily)





A newborn male giant panda cub is seen inside an incubator at a giant panda breeding centre in Chengdu, Sichuan Province, China, May 6, 2016. (Photo by Reuters/China Daily)





In this December 7, 2007 file photo a bobcat trapped in a snare at the Billings, Mont., airport looks out of his crate before he is released east of Shepherd, Mont. An environmental group is asking a federal judge to halt a United States government program that allows the export of tens of thousands of bobcat pelts and a small number of gray wolf pelts for sale on the international fur market. (Photo by Casey Riffe/The Billings Gazette via AP Photo)





A young brown bear on Myslenickie Turnie, in Zakopane, Poland, 29 April 2016. Bears in the Tatra National Park are waking up after their winter hibernation. (Photo by Grzegorz Momot/EPA)





Egrets protect their eggs on a tree in Panbazar area at the banks of the Brahmaputra river in Guwahati, India, 03 May 2016. During this season of the year, hundreds of egrets build their nests in thickly populated trees in Panbazar area, which is a major business center of Guwahati city. With the expansion of the city and fast growing high-rise buildings, many trees of this area have been cut down, as a result, egrets are quickly losing their breeding habitat. (Photo by EPA/Stringer)





Two macaques play in a tree on Shuangta mountain in Chengde City, north China’s Hebei province. (Photo by Xinhua/Rex Features/Shutterstock)





A stork cares for its chicks in their nest at the Eekholt wildlife park near Grossenaspe, northern Germany, on May 2, 2016. (Photo by Carsten Rehder/AFP Photo/DPA)





A Hokkaido squirrel checks out its surroundings in a patch of wild flowers in full bloom on the grounds of Urausu Jinja Shrine on May 1, 2016 in Urausu, Hokkaido, Japan. The blossoming of blue Corydalis ambigua flowers and the pink flowers of Erythronium japonicum, a kind of trout lily, signal the arrival of spring on Japan's northernmost main island. (Photo by The Asahi Shimbun via Getty Images)





An egret lands near its nest (unseen) in Panbazar area at the banks of the Brahmaputra River in Guwahati, India, 03 May 2016. During this season of the year, hundreds of egrets build their nests in thickly populated trees in Panbazar area, which is a major business center of Guwahati city. With the expansion of the city and fast growing high-rise buildings, many trees of this area have been cut down, as a result, egrets are quickly losing their breeding habitat. (Photo by EPA/Stringer)





A bird takes rest on a tow-end of a Shikara (Gondola) during rains in Srinagar, the summer capital of Indian Kashmir, India, 04 May 2016. The region witnessed moderate rains bringing drop in temperature. (Photo by Farooq Khan/EPA)





Flamingos stand in the sun in their enclosure at the zoo in Cologne, western Germany, on May 4, 2016. (Photo by Federico Gambarini/AFP Photo/DPA)





Flamingos stand in the sun in their enclosure at the zoo in Cologne, western Germany, on May 4, 2016. (Photo by Federico Gambarini/AFP Photo/DPA)





This picture taken on May 3, 2016 in Alue Bilie, in Tripa peat swamp area shows a five-year-old wildlife orangutan trapped and being rescued by Sumatran Orangutan Conservation Programme (SOCP) and Yayasan Ekosistem Lestari (YEL) in Aceh province.
The Orangutan is currently listed as critically Endangered by the IUCN (International Union for the Conservation of Nature and Natural Resources) with only about 6,000 Sumatran orangutans remaining. (Photo by Chaideer Mahyuddin/AFP Photo)





This picture taken on May 3, 2016 in Alue Bilie, in Tripa peat swamp area shows an Indonesian veterinarian checking a five-year-old wildlife orangutan that was trapped and being rescued by Sumatran Orangutan Conservation Programme (SOCP) and Yayasan Ekosistem Lestari (YEL) in Aceh province. (Photo by Chaideer Mahyuddin/AFP Photo)





The Baby Gazelle “Anton” at the Frankfurt Zoo in Frankfurt, Germany on May 4, 2016. The young animal was born on April 14. (Photo by Bernd Kammerer/Startraksphoto.com)





One of the three Koala bears at Pairi Daiza animal park in Brugelette, Belgium, 06 May 2016. The quarantine of Koalas Carina, Coco and Zeldat has ended and they are going on show to the public in at the zoo in Brugelette. The three arrived from Brisbane, Australia on 16 April 2016 as there arrival in Belgium was delayed by the Belgium terror attacks. (Photo by Stephanie Lecocq/EPA)





A picture made available 05 May 2016 shows a small toad at the Jambatu Center for Research and Conservation of Amphibians in Quito, Ecuador, 15 April 2016. The Jambatu Center, a state and private initiative working for the conservation of amphibians, researches for biomedicine aiming to find future remedies for human diseases. Ecuador counts with a nine percent of the world's amphibian species with over 600 frog families, 546 of them already identified. According to experts, frogs and toads have worthy molecules that can be used to treat diseases such as the Alzheimer's and can be used as an alternative to painkillers, as their secretions the can be a 100 times more powerful than morphine. (Photo by Jose Jacome/EPA)





A photograph made availalble on 30 April 2016 showing two young Bennett Kangaroos together in Sababurg zoo, near Hofgeismar, Germany, 29 April 2016. (Photo by Uwe Zucchi/EPA)





A blue-eyed black lemur displays his green-blue eyes at Bristol Zoo Gardens, England on April 29, 2016 where a recently built enclosure is enriching the lives of the almost extinct species, which are one of the only other primates alongside humans to have consistently blue eyes. (Photo by Ben Birchall/PA Images/Startraksphoto.com)





Xing Xing, formerly known as Fu Wa, a male giant panda from China, eats bamboo at the Giant Panda Conservation Center at the National Zoo in Kuala Lumpur, Malaysia on Wednesday, May 4, 2016. The two giant pandas have been on loan to Malaysia from China for 10 years since May 21, 2014 to mark the 40th anniversary of the establishment of diplomatic ties between the two nations. (Photo by Vincent Thian/AP Photo)





A White Tiger are seen at National Zoo in Kuala Lumpur, Malaysia on Wednesday, May 4, 2016. The 53-year-old National Zoo, locally known as Zoo Negara, has around 5,000 specimen from more than 450 species of mammals, birds, reptiles, amphibians and fish. (Photo by Vincent Thian/AP Photo)





Goslings feed near the Schuylkill River on Tuesday, May 3, 2016, in Philadelphia. (Photo by Matt Rourke/AP Photo)