Baby polar bear twins head outside for the first time, at the Dierenrijk Zoo, in Nuenen, The Netherlands, February 25, 2016. The twin brothers were born in November of 2015. (Photo by Remko De Waal/EPA)





A kangaroo is seen on the 6th fairway as players prepare to tee off during the Pro-Am ahead of the 2016 Perth International at Lake Karrinyup Country Club on February 24, 2016 in Perth, Australia. (Photo by Paul Kane/Getty Images)





A picture made available on 23 February 2016 shows two penguins swimming in a pool at the zoo in Frankfurt am Main, Germany, 22 February 2016. The zoo is planning to build a new enclosure for penguins. (Photo by Frank Rumpenhorst/EPA)





A baby female Western lowland gorilla is seen in this handout photograph dated February 17, 2016, and released by Bristol Zoo in Britain to Reuters on February 23, 2016. A baby gorilla has been delivered by a rare caesarean section at the British zoo in an operation performed by a local hospital gynaecologist, the zoo said on Tuesday. (Photo by Reuters/Bristol Zoo)





A baby female Western lowland gorilla is seen in this handout photograph dated February 17, 2016, and released by Bristol Zoo in Britain to Reuters on February 23, 2016. (Photo by Reuters/Bristol Zoo)





A baby female Western lowland gorilla is seen in this handout photograph dated February 17, 2016, and released by Bristol Zoo in Britain to Reuters on February 23, 2016. (Photo by Reuters/Bristol Zoo)





Polar bears play inside their enclosure at Prague Zoo, Czech Republic, February 24, 2016. (Photo by David W. Cerny/Reuters)





A 3-day old giraffe stands next to its mother at Jerusalem's Biblical Zoo February 24, 2016. A spokesperson for the zoo said on Wednesday that the calf's s*x was not known yet. (Photo by Ronen Zvulun/Reuters)





Giraffes stand in their enclosure at Jerusalem's Biblical Zoo February 24, 2016. (Photo by Ronen Zvulun/Reuters)





Dragon, a male Snow Leopard also known in Russia as Snow Bars or Irbis, looks from behind a frozen window in its enclosure at the Royev Ruchey zoo in a suburb of Krasnoyarsk, Siberia, Russia, February 25, 2016. The snow leopard who lives in Asian mountain systems including Sayan, Altai, Tien Shan, Pamir and others, is one of the rare species among wild cats in the world. (Photo by Ilya Naymushin/Reuters)





Pamir, a nine-year-old Tien Shan White Claw bear, plays with a log in its enclosure as he wakes up after winter hibernation at the Royev Ruchey zoo in a suburb of Krasnoyarsk, Siberia, Russia, February 25, 2016. Some Siberian bears have woken up two to three weeks earlier than usual due to the warm weather, according to zoo employees. (Photo by Ilya Naymushin/Reuters)





A one-month old baby hippo enjoys diving in the water pool at the hippopotamus enclosure of the zoo in Prague, Czech Republic, 26 February 2016. The baby-hippo, which was born on 28 January 2016, has not yet been named. (Photo by Filip Singer/EPA)





Juno the polar bear meets the public for the first time at the Metro Toronto Zoo February 25, 2016. Born November 11, 2015, Juno is one of two bears that survived. She was born on Remembrance Day and her name was chosen to remember the successful operation carried out by Canadian soldiers on Juno Beach in Normandy, France on D-Day. (Photo by Bernard Weil/The Toronto Star via ZUMA Wire)





This photo made in summer 2015 and provided by Jesica Waller shows a three-week-old baby lobster at Bigelow Laboratory for Ocean Sciences in East Boothbay, Maine. Her photograph won a National Science Foundation visual media award and also appears in the March/April 2016 edition of Popular Science. Waller, who's in her second year of a master's program in marine biology at the University of Maine, is studying the effect of climate change scenarios on larval lobsters. (Photo by Jesica Waller via AP Photo)





A wild rhesus macaque monkey carries a corn cob thrown on the street to feed it at Khao Sam Muk, known as monkey mountain, near the popular local Thai beach side of Bang Saen, in Chonburi, Thailand, 22 February 2016. Bang Saen beach, the closest recreational beach to Bangkok, is transformed every weekend by a majority Thai clientele who flock to enjoy the sea breeze and freshly caught seafood. It is host to a number of sports and entertainment events. (Photo by Barbara Walton/EPA)





Female of pygmy hippopotamus called Malaya from Netherlands in zoo in Dvur Kralove nad Labem, Czech Republic, February 22, 2016. (Photo by David Tanecek/CTK via ZUMA Press)





This undated photo provided by the U.S. Fish and Wildlife Service shows a California condor, identified as Condor No. 247, near his nest at the Hopper Mountain National Wildlife Refuge near Fillmore in southern California, about 65 miles northwest of Los Angeles. Officials with the U.S. Fish and Wildlife Service said Monday, February 22, 2016, that for the first time in decades, more condors hatched and fledged in the wild last year than adult wild condors died. (Photo by Joseph Brandt/U.S. Fish and Wildlife Service via AP Photo)





A male sage grouse struts in the early morning hours April 22, 2015 on a lek outside Baggs, Wyoming. Environmental groups sued Thursday, February 25, 2016, to force the Obama administration to impose more restrictions on oil and gas drilling, grazing and other activities blamed for the decline of greater sage grouse across the American West. (Photo by Dan Cepeda/The Casper Star-Tribune via AP Photo)





This photo taken April 10, 2014, shows a male sage grouse trying to impress a group of hens, at left, near the base of the Rattlesnake Range in southwest Natrona County, Wyoming. Sage grouse gather on the mating grounds at dawn for several weeks each spring. (Photo by Alan Rogers/The Casper Star-Tribune via AP Photo)





Kumaran Sesshe (R), head keeper of great apes with Wild Reserves Singapore feeds orangutan, newly named Ah Meng (C) with its foster brother Bino (L) at the Singapore Zoo on February 26, 2016. The Singapore Zoo revealed on February 26 a newly named orangutan after its descendant Ah Meng who is survived by six family members in Singapore Zoo. The first Ah Meng died in 2008. (Photo by Roslan Rahman/AFP Photo)





Ah Meng, a Sumatran orang-utan is fed by her keeper as she is presented to the media at the Singapore Zoo, in Singapore, 26 February 2016. Formerly known as “Ishta”, the five-year-old primate is the grand-daughter of the original Ah Meng, an icon of the Singapore Zoo and a symbol of the successful conservation for wild orang-utans. (Wallace Woon/EPA)





An anhinga catches a fish in a pond off the 11th green during the second round of the Honda Classic golf tournament, Friday, February 26, 2016, in Palm Beach Gardens, Fla. (Photo by Lynne Sladky/AP Photo)





Lion cubs cuddle in the Gyongyos Zoo in Gyongyos, 79 kms northeast of Budapest, Hungary, Tuesday, February 23, 2016. The yet unnamed one male and two female cubs, the fourth litter of lioness Elza, were born on Jan. 12. (Photo by Peter Komka/MTI via AP Photo)