A 4- months old cheetah cub is seen in its enclosure at Wildlife Reserves Singapore zoo on February 15, 2017. Jurong Bird Park, Night Safari, River Safari and Singapore Zoo have reported over 600 animal births and hatchings in 2016, and among them are highly threatened Southeast Asian animals. (Photo by Roslan Rahman/AFP Photo)





In this February 15, 2017 photograph, provided media outlets by the Hattiesburg Zoo, its newest addition, a Hoffman's two-toed baby sloth, born Feb. 5 at the zoo was prepped for its first appearance before local media at the Hattiesburg, Miss., Zoo. The sloth, unnamed because gender DNA tests must be performed to determine the sloth's s*x. Born fully furred, eyes open and clawed, with teeth, it typically remains dependent on its mother for about a year. (Photo by Paige Crane/Hattiesburg Zoo Public Relations via AP Photo)





In this February 15, 2017 photograph, provided media outlets by the Hattiesburg Zoo, its newest addition, a Hoffman's two-toed baby sloth, born Feb. 5 at the zoo was prepped for its first appearance before local media at the Hattiesburg, Miss., Zoo. (Photo by Paige Crane/Hattiesburg Zoo Public Relations via AP Photo)





Zitting cisticola seen feeding food to baby chicks in her nest on February 8, 2017 in Padang, Indonesia. (Photo by Riau Images/Barcroft Images)





A baby cotton top Tamarin (L) clings on its mother at Wildlife Reserves Singapore zoo on February 15, 2017. Jurong Bird Park, Night Safari, River Safari and Singapore Zoo have reported over 600 animal births and hatchings in 2016, and among them are highly threatened Southeast Asian animals. (Photo by Roslan Rahman/AFP Photo)





Deer run across a meadow near Hirschling, southern Germany, Monday, February 13, 2017. (Photo by Armin Weigel/DPA via AP Photo)





In this Saturday, February 11, 2017, photo, a bird flies by flowers of an orange silk cotton tree, which is popular in central Myanmar for its edible flowers, in Naypyitaw, Myanmar. Myanmar's summer season starts in March and ends in early June. (Photo by Aung Shine Oo/AP Photo)





A monkey eats flowers during the annual Makha Bucha Day which celebrates Buddha's teachings at the Oudong mountain in Kandal province, Cambodia, February 11, 2017. (Photo by Samrang Pring/Reuters)





A female Northern Cardinal sits on a bird feeder in falling snow in the Village of Valley Cottage, New York, a suburb north of New York City, U.S. February 12, 2017. (Photo by Mike Segar/Reuters)





Young alpacas, male Romeo (L) and female Juliette, walk inside their open air enclosure as employees congratulate coupled animals on Valentine's Day at the Roev Ruchey Zoo in Krasnoyarsk, Russia February 14, 2017. (Photo by Ilya Naymushin/Reuters)





A seagull flies over the waterfront during snowfalls at the port of Volendam near Amsterdam, Netherlands, February 11, 2017. (Photo by Francois Lenoir/Reuters)





A heron is pictured at the port of Volendam near Amsterdam, Netherlands, February 11, 2017. (Photo by Francois Lenoir/Reuters)





A seagull is pictured during snowfalls at the port of Volendam near Amsterdam, Netherlands, February 11, 2017. (Photo by Francois Lenoir/Reuters)





A man feeds swan on the shores of Ohrid lake in Ohrid, Macedonia, February 15, 2017. (Photo by Ognen Teofilovski/Reuters)





Gulls fight for peanuts at the shores of Ohrid lake in Ohrid, Macedonia, February 15, 2017. (Photo by Ognen Teofilovski/Reuters)





Panda Bao Bao eats bamboo during a farewell event at the National Zoo in Washington, DC, U.S., February 16, 2017. Bao Bao will soon be moved to China. (Photo by Aaron P. Bernstein/Reuters)





Baboons sit by a road near Naivasha, Kenya February 17, 2017. (Photo by Goran Tomasevic/Reuters)





Baboons sit by a road near Naivasha, Kenya February 17, 2017. (Photo by Goran Tomasevic/Reuters)





Newborn Malaysian tiger cubs rest in their nursery before they are fed at the Cincinnati Zoo & Botanical Gardens, Monday, February 13, 2017, in Cincinnati. Three cubs were born on Feb. 3 to 3-year-old Cinta, a first-time mother, in the zoo's captive breeding program. Zookeepers decided to intervene when Cinta failed to display her maternal instincts. “It's not uncommon for first-time tiger moms not to know what to do. They can be aggressive and even harm or kill the cubs”, said Mike Dulaney, curator of mammals and vice coordinator of the Malayan Tiger Species Survival Plan (SSP). “Nursery staff is keeping them warm and feeding them every three hours”. (Photo by John Minchillo/AP Photo)





Head nursery keeper Dawn Strasser feeds newborn Malaysian tiger cubs at the Cincinnati Zoo & Botanical Gardens, Monday, February 13, 2017, in Cincinnati. (Photo by John Minchillo/AP Photo)





Sugar gliders, Candy and Popcorn, enjoy their favourite food, Nectar, at Wild Life Sydney Zoo on February 14, 2017 in Sydney, Australia. The treat made up of honey, high protein baby cereal and egg yolks is the human equivalent to chocolate to the Sugar Gliders. St. Valentine's Day or the Feast of Saint Valentine began as a celebration of the early Christian Saint Valentinus. From the 18th Century onwards it has steadily transformed into a celebration of romantic love and sentiment in many countries around the world. (Photo by James D. Morgan/Getty Images)





Princess parrots enjoy a heart shaped pumpkin enrichment treat at Wild Life Sydney Zoo on February 14, 2017 in Sydney, Australia. (Photo by James D. Morgan/Getty Images)





The Western lowland gorilla “Coco” pictured at Madrid zoo on February 14, 2017. (Photo by Jorge Sanz/Pacific Press/LightRocket via Getty Images)





A Lesser Flamingo is seen at the Le Cornelle Animal Park, in Valbrembo, near Milan, Italy, Friday, February 17, 2017. (Photo by Antonio Calanni/AP Photo)





Baby gorilla relaxes on her mother Kibara at the zoo in Leipzig, Germany, Thursday, February 16, 2017. The female baby gorilla was born on Dec. 4, 2016 and was named Kianga on Thursday. (Photo by Jens Meyer/AP Photo)





Male lions fight at the Kruger National Park on January 31, 2017 in South Africa. Photographer Justin Thorne manages to capture the dramatic images of this “once in a lifetime sighting”. (Photo by Justin Thorne/Greatstock/Barcroft Images)





Male lions fight at the Kruger National Park on January 31, 2017 in South Africa. (Photo by Justin Thorne/Greatstock/Barcroft Images)