A close up view of a blue and gold macaw at the Pet Expo 2016 held at the Singapore Expo convention hall in Singapore, March 25, 2016. The third edition of the Singapore Expo will showcase a range of workshops and vendors selling pet care products and is expected to draw in more than 30,000 visitors and 10,000 pets. (Photo by Wallace Woon/EPA)





A young houndshark swimming in a large aquarium at the AquaDom and Sea Life Berlin, Germany, 22 March 2016. The roughly 2-month-old and 30cm long animals, which were born here, are seen here in a so-called shark nursery. (Photo by Jens Kalaene/EPA)





A Monarch butterfly caterpillar is pictured on a plant in North Miami Beach, Florida, March 19, 2016. (Photo by Carlo Allegri/Reuters)





An African elephant eats a carrot thrown into his enclosure by visitors at wildlife park “Opel Zoo” in Kronberg, Germany, March 20, 2016. (Photo by Kai Pfaffenbach/Reuters)





An African elephant eyes visitors as he stands in an enclosure at wildlife park “Opel Zoo” in Kronberg, Germany, March 20, 2016. (Photo by Kai Pfaffenbach/Reuters)





A flamingo cleans his feathers as he stands in an enclosure of wildlife park “Opel Zoo” in Kronberg, Germany, March 20, 2016. (Photo by Kai Pfaffenbach/Reuters)





A meerkat enjoys the warmth of a heat lamp while standing in the meerkat enclosure at wildlife park “Opel Zoo” in Kronberg, Germany, March 20, 2016. (Photo by Kai Pfaffenbach/Reuters)





A white stork turns his head as he stands in an enclosure of wildlife park “Opel Zoo” in Kronberg, Germany, March 20, 2016. (Photo by Kai Pfaffenbach/Reuters)





A flamingo cleans his feathers as he stands in an enclosure at wildlife park “Opel Zoo” in Kronberg, Germany, March 20, 2016. (Photo by Kai Pfaffenbach/Reuters)





A Bactrian camel eats a carrot thrown into his enclosure by visitors at wildlife park “Opel Zoo” in Kronberg, Germany, March 20, 2016. (Photo by Kai Pfaffenbach/Reuters)





Camels rest and graze next to a field near the southern israeli town of Rahat March 21, 2016. (Photo by Baz Ratner/Reuters)





Camel calves rest next to a field near the southern Israeli town of Rahat March 21, 2016. (Photo by Baz Ratner/Reuters)





Camels rest next to a field near the southern Israeli town of Rahat March 21, 2016. (Photo by Baz Ratner/Reuters)





Two giant pandas mate in the zoo of Schoenbrunn in Vienna, Austria, March 23, 2016. (Photo by Tiergarten Schonbrunn/Reuters/Norbert Potensky)





A tourist shoot a picture of a seagull with mobile phone at the Imperial Forum (Fori Imperiali) street downtown Rome, Italy, March 23, 2016. (Photo by Stefano Rellandini/Reuters)





Polar bear Wolodja jumps over polar bear Tonja into the water in the enclosure at the zoo in Berlin, Germany, March 24, 2016. (Photo by Paul Zinken/EPA)





Enjoying a tickle from her keeper, an orphaned orangutan at the SOCP Quarantine Centre in Sumatra, Indonesia on March 20, 2016. The island’s orangutan population has been devastated in recent years as the forest areas are destroyed to make way for palm oil plantations. (Photo by Jami Tarris/Barcroft Media)





An orangutan cradles her infant’s hand in Sumatra, Indonesia on March 20, 2016. (Photo by Jami Tarris/Barcroft Media)





A rare albino red-necked wallaby and its newborn are seen in their enclosure in the Zlin zoo, the Czech Republic, on Wednesday, March 23, 2016. (Photo by Dalibor Gluck/CTK via AP Photo)





A picture made available on 24 March 2015 shows a rare white Bennett's Wallaby (Macropus Rufogriseus) on South Bruny Island, off the south-east coast of Tasmania, Australia, 22 December 2015. Having few predators on the island, the Albino Wallabies have maintained healthy numbers, yet are one of the rarest fauna found on the island. (Photo by Dave Hunt/EPA)





In this Thursday, March 24, 2016, photo provided by the Fremont Police Department, is a young seal pup who made a wrong turn, ending up in Fremont, Calif. The baby California fur seal somehow made it four miles from the water to the front yard of a home in the San Francisco Bay Area Thursday. The seal had no visible signs of injuries and was taken to the Marine Mammal Center in Sausalito for care. (Photo by Fremont Police Department via AP Photo)





The polar bear cub (pictured with its mother Cora) is presented to the public in the ZOO of Brno, Czech Republic, on Thursday, March 17, 2016. (Photo by Vaclav Salek/CTK via ZUMA Press)





Nile Crocodile, Crocodylus niloticus, in Crocodile Zoo in Protivin, Czech Republic, March 22, 2016. (Photo by Vaclav Pancer/CTK via ZUMA Press)





A 12 day-old male rhino calf(R)is fed a bottle of milk by an Indian animal keeper at The Centre for Wildlife Rehabilitation and Conservation facility at Kaziranga National Park in the north-eastern Indian state of Assam on March 24, 2016. Wearing a red and grey-striped blanket, a 12-day-old baby rhinoceros is bottle-fed by keepers at a wildlife rehabilitation centre in northeast India, after being found alone in a remote forest region. (Photo by AFP Photo)





An Indian animal keeper feeds milk to young elephants that were rescued from two different areas in Assam, at the Centre for Wildlife Rehabilitation and Conservation facility at Kaziranga National Park in the northeastern Indian state of Assam on March 25, 2016. (Photo by Biju Boro/AFP Photo)





Staff at Blair Drummond Safari Park in London, England put bug filled painted unfertilized Ostrich eggs in their Meerkats and Marmosets enclosures ahead of Easter on March 24, 2016. (Photo by Andrew Milligan/PA Images)





A ram stands pegged to the ground ahead of a ram fighting competition held at the National Stadium in Lagos on March 20, 2016. With eight weight categories and referees, the Ram Lovers Association of Nigeria (RLAM) is working to bring ram fighting into the mainstream by enforcing a strict set of rules to ensure ram safety and fair play. Hundreds of people gathered under a blazing sun to watch the rams fight on a sandy pitch, fenced off with orange and blue rope. The Nigerian ram fighting rules state that at the start of a tournament rams are allowed to hit 30 “blows” before the referee calls a tie. By the finals, rams can headbutt up to 100 times. (Photo by Stefan Heunis/AFP Photo)