A young koala girl takes a ride on its mother Eora at the zoo in Duisburg, Germany, Jan. 17, 2019. The yet unnamed koala is almost one year old and still rides on its mother's back.

Female rhino Marcita stands with her new born cub in an enclosure at the Zoopark in Erfurt, Germany, Jan. 3, 2019. The male rhino cub was born on Dec. 29, 2018 at the zoo.

A three-day old Grevy's zebra stands by its mother in the Nyiregyhaza Animal Park in Nyiregyhaza, Budapest, Hungary, Jan. 3, 2019. Grevy's zebra is the largest species of zebras and the largest wild equid.

Vets check a baby black-furred gibbon, rescued from a villager, at the local nature conservation agency's office in Banda Aceh, Indonesia, Nov. 1, 2018.

A western lowland gorilla mother holds her baby gorilla after giving birth, Oct. 18, 2018. The western lowland gorilla lives in central Africa.

Tiger cubs Melati and Mya play in their new enclosure at the National Zoo and Aquarium in Canberra, Australia, Oct. 10, 2018.

An Atlantic seal pup lies on the rocks at St Martin's Haven, Pembrokeshire, Wales, Britain Oct. 8, 2018. Seal pups are born with fluffy white non-waterproof coats which they shed in their fourth week.

A two-week old Indian rhinoceros stands by his mother Jasmin in the Nyiregyhaza Animal Park in Nyiregyhaza, east of Budapest, Hungary, Oct. 9, 2018. The baby rhino was born on Sept. 26, 2018. He is the first of the species ever born in Hungary and the fourth one born in Europe this year.

Giant panda cubs at Chengdu Research Base of Giant Panda Breeding in Chengdu, China., Sept. 28, 2018. A total of 12 cubs born in the base in 2018 met the public.

An eight-months-old female koala cub at the zoo in Duisburg, Germany, Sept. 28,2018.

A young Cheetah with its mother at their enclosure in the zoo in Opole, Poland, Sept. 24, 2018. Three young Cheetahs were born nine weeks ago at the Zoo in Opole.

A clouded leopard cub is in a bucket during a medical exam, Sept. 17, 2018, at the Mulhouse zoo, in eastern France.

A mountain lion kitten which National Park Service researchers discovered in August 2018 in a remote area of the Santa Monica Mountains, Calif., is shown in this image released on Sept. 4, 2018.

The great one-horned rhinoceros Betty, rear, and her new born son at their enclosure at the Zoo in Berlin, Sept. 6, 2018.

A two-month-old white tiger abandoned by its mother, plays with a Golden Retriever puppy next to an African lion at Beijing Wildlife Park in Beijing, Aug. 30, 2018.

A West African dwarf crocodile hatches from its egg on Aug. 27, 2018, at the Planet Exotica zoological and botanical garden in Royan, France.

Ten-days old male cub of a Malayan tapir (Tapirus indicus) is seen in the Zlin Zoo, Czech Republic, Aug. 6, 2018.

Walrus Dyna (L) and her offspring sit in their enclosure during their first visit of the outdoor area at the Hagenbeck zoo in Hamburg, northern Germany, Aug. 3, 2018.

Baby elephants play next to their herd of elephants at Kaudulla national park in Habarana, Sri Lanka, July 30, 2018.

A giant panda, Long Long and its newborn cub at the Chimelong Safari Park in Guangzhou, capital of south China's Guangdong Province. Long Long, the first giant panda which was born in Guangdong in 2013, gave birth to a male giant cub on July 12 at the Chimelong Safari Park.

A white-nosed coati baby runs through its enclosure at the zoo in Magdeburg,Germany, July 25, 2018. Five white-nosed coati babies were born at the zoo on June 3, 2018.

Caretakers of Burgers' Zoo give two Sri Lankan leopard cubs a medical check-up, July 12, 2018, in Arnhem, Netherlands.

A baby prehensile-tailed porcupine is seen at Brookfield Zoo in Brookfield, Ill. The baby porcupine, known as a porcupette, was born at the zoo on July 2, 2018 and is being hand-reared by staff when it became clear that his mom was not providing him proper maternal care, as she was not allowing him to nurse.

Seal Shiva, right, plays with her 2 days old cub at the zoo in Berlin, July 10, 2018.

Seal Shiva plays with her 2 days old cub at the zoo in Berlin, July 10, 2018.

An adorable Barbary lion cub is seen playing at the Olomouc Zoo, Czech Republic, June 18, 2018. The cub were born to mum Lilly on May 11 and today were spotted indulging in a spot of rough and tumble before being given a thorough clean by mum Lilly. The male lion cub called Thembi which means "Hope."

An African Elephant calf is seen next to its mother, Kwanza, four hours after its birth in the Nyiregyhaza Animal Park in Nyiregyhaza, Hungary, June 16, 2018. The 17-year-old Kwanza has an older male calf named Kito, born three years prior.

An African Elephant calf is seen next to its mother, Kwanza, four hours after its birth in the Nyiregyhaza Animal Park in Nyiregyhaza, Hungary, June 16, 2018. The 17-year-old Kwanza has an older male calf named Kito, born three years prior.

An African Elephant calf is seen next to its mother, Kwanza, four hours after its birth in the Nyiregyhaza Animal Park in Nyiregyhaza, Hungary, June 16, 2018. The 17-year-old Kwanza has an older male calf named Kito, born three years prior.

The Lugdon family from Maine said on Facebook they briefly took care of a baby moose after finding it in the wild on June 9, 2018. Shannon Lugdon wrote that they followed wildlife authorities' advice to keep away from the moose for a day before returning to find that it was still alone in the same area. She said that her dog became "fast friends" with the moose, nicknamed Miss Maggie - who followed them around begging for attention. Lugdon wrote that the animal was picked up by a biologist a day later and transferred to the Maine Wildlife Park and it was estimated to be just six days old.

A zoo worker plays with a new baby panda at Malaysia Zoo in Kuala Lumpur, Malaysia, May 26, 2018. A baby panda born in a Malaysian zoo five months ago has made her first media appearance.

Three bear cubs, four months old are in an enclosure at the Belitsa bear sanctuary in Belitsa, May 24, 2018. The bears were found by the Bulgarian authorities in the wild in the Rhodope mountains and rescued from the Dancing Bears Park near the village of Belitsa.

Toy, a 10-day-old female giraffe named after Israeli singer Netta Barzilai's song "Toy", winner of the 2018 Eurovision Song Contest, is seen with its mother Laila in their pen at Jerusalem's Biblical Zoo, May 21, 2018.

Toy, a 10-day-old female giraffe named after Israeli singer Netta Barzilai's song "Toy", winner of the 2018 Eurovision Song Contest, is seen with its mother Laila in their pen at Jerusalem's Biblical Zoo, May 21, 2018.

A gosling gets on its tippy toes as it waddles with other Canada geese along the border of the river Main in Frankfurt, Germany, May 16, 2018.

One of two newborn Himalayan bear cubs, which were named Yashin and Streltsov in honor of well-known Soviet football players and Olympic champions Lev Yashin and Eduard Streltsov, is seen inside an open-air cage at the Royev Ruchey Zoo in Krasnoyarsk, Russia April 26, 2018.

An Andean bear baby looks around as it enters first time its outdoor enclosure in the zoo in Frankfurt, April 23, 2018.

A newborn Asian elephant is pictured with its mother Phyo Phyo on the first day of a public appearance at the Planckendael Zoo in Mechelen, Belgium, April 11, 2018.

A newborn Asian elephant is pictured with members of its family on the first day of a public appearance at the Planckendael Zoo in Mechelen, Belgium, April 11, 2018.

Sassafras, a newborn Koala is pictured with its mother Alinga at the Planckendael Zoo in Mechelen, Belgium, April 11, 2018.

The four-month-old okapi, named at birth after Meghan Markle in celebration of the forthcoming Royal Wedding, has started to venture out of her stable for the first time under the watchful gaze of her mum, Oni, April 5, 2018, in the ZSL London Zoo. Okapis are native to the rain forests of the Democratic Republic of Congo where the endangered species faces numerous threats, including poaching and habitat loss.

A guereza monkey (Colobus Guereza) holds a newborn baby at Prague Zoo, Czech Republic, April 5, 2018.

Baby elephant Kanja at the The wildlife park in Hamburg, Germany, March 28, 2018.

The Highland Wildlife Park female polar bear's new cub walks around their enclosure, March 20, 2018, in Kingussie, Scotland. The Royal Zoological Society of Scotland announced in January that its female polar bear, Victoria, gave birth at Highland Wildlife Park to the first cub born in the UK in 25 years.

The Highland Wildlife Park female polar bear's new cub walks around their enclosure, March 20, 2018, in Kingussie, Scotland. The Royal Zoological Society of Scotland announced in January that its female polar bear, Victoria, gave birth at Highland Wildlife Park to the first cub born in the UK in 25 years.

The Highland Wildlife Park female polar bear's new cub walks around their enclosure, March 20, 2018, in Kingussie, Scotland. The Royal Zoological Society of Scotland announced in January that its female polar bear, Victoria, gave birth at Highland Wildlife Park to the first cub born in the UK in 25 years.

Two lion cubs are seen at the Leningrad city zoo in St. Petersburg, Russia, Feb. 12, 2018.

Dashya, a 9-year-old hippopotamus, looks after her 11-day-old calf in an enclosure in the Bannerghatta Biological Park in Bangalore, India, Feb. 9, 2018.

Two Angola giraffes at the Zoo of Lisbon in Portugal, Feb. 1, 2018. The zoo has a new inhabitant, a young Angola Giraffe that was born, Nov. 16, 2017.

A 4-month-old white lion cub is presented to the press in a cage at the Altiplano Zoo in Tlaxcala, Mexico, Jan. 18, 2018.

A Bornean orang utan baby, Khansa, makes an appearance at the Singapore Zoo, Jan 11, 2018. The animals under the care of the Wildlife Reserves Singapore (WRS) gave birth to over 540 babies in 2017.

The tiger Maruschka and her cub open up a Christmas present at the Hagenbecks Zoo in Hamburg, Germany Dec. 5, 2017.

Panda cubs lay on the ground at the Shenshuping Base of China Conservation and Research Centre of the Giant Panda in Wenchuan in China.

The little tigress "Stormi" is pictured in its new enclosure in the zoo in Magdeburg, Germany, Oct. 10, 2017.

Two otters play in the Otter Center Hankensbuettel, Germany, Oct. 10, 2017.

Seven-week-old fairy penguin chick named Nippet is weighed by a zoo keeper at Melbourne Zoo in Melbourne, Australia, Sept. 14, 2017. Keepers are hand feeding the two chicks between 12 and 15 fish a day and getting them ready to join the Wild Sea Penguin colony.

A young sloth sits in a bucket at the Bergzoo in Halle an der Saale, Germany, Sept. 12, 2017. The two-toed sloth baby was born at the zoo, Aug.5, 2017.

A young sloth sits in a bucket at the Bergzoo zoo in Halle an der Saale, Germany, Sept. 12, 2017. The two-toed sloth baby was born at the zoo, Aug.5, 2017.

Hsiao-Ning an Orangutan sits with its offspring "Niah" in their enclosure at the zoo in Rostock, Germany, Sept. 8, 2017.

Three lion cubs go out in front of the public for the first time at safari park Beekse Bergen in Hilvarenbeek, the Netherlands, Sept. 7, 2017. Mother Mariska gave birth to a tripling on June 27.

A white koala joey on her mother, Tia, at the Australia Zoo on Queensland's Sunshine Coast.

An animal keeper holds a desert fox cub at the zoo in Aue, Germany, Aug. 16, 2017. The desert fox was born on July 1, 2017 and belongs to the smallest species of wild dogs.

A baby orangutan relaxes near its mother, Padana, at the zoo in Leipzig, Germany, Aug. 15, 2017. The baby orangutan, whose sex is not yet known, was born on Aug. 5, 2017.

Zoo keeper Eva Ravagni holds the 2.5-month old Borneo Orangutan baby "Hujan" in her arms in Krefeld, Germany, Aug. 15, 2017. The baby was abandoned by its mother and has to be fed with a baby bottle.

Shortly after being rescued from Syria, the lioness, Dana, gave birth to a cub, which was named Hajar. The animal welfare organization, Four Paws International, which rescued 13 animals from a zoo near Aleppo, reported the mother and her cub are in good condition, considering their circumstances. An ultrasound preformed during the trip from Syria to Lebanon showed she was pregnant with two cubs, but veterinarian Dr. Amir Khalil said there was little hope for the second cub to be born alive. <br><br><a href="http://abcn.ws/2wH6N7w" target="external">Full story</a>

A Snow Leopard (Panthera uncia) at the NABU center (Nature and Biodiversity Conservation Union), a German organization that aims at reintroducing the panther and fight against poaching, near the Issyk Kul lake, in the outskirts of Semenovka village, some 205 miles southeast of Bishkek, the capital of Kyrgyzstan, Aug. 7, 2017.

A mother gorilla cradles her young baby as they slept together wrapped in each other's arm at the Calgary Zoo in Alberta, Canada, a not-for-profit organisation which homes almost 800 animals and helps to preserve species, Aug. 8, 2017.

Newly-born cheetah cubs and their mother Savannah rest in their enclosure at Prague Zoo, Czech Republic, July 31, 2017. Quintuplets of cheetah cubs were born on May 15, 2017.

An unnamed koala clings to its mother in their enclosure at the Duisburg zoo, western Germany, on July 26, 2017.

Tiger offspring "Stormi" sitting on the floor in the Zoo in Magdeburg, Germany, July 26, 2017. The cat was born in the Tiger House of the Zoo on June 22, 2017 and christened "Stormi" in remembrance of the storm front "Paul".

A green sea turtle swims in a nursing pool at the Sea Turtle Conservation Center in Sattahip Naval Base, Chonburi province, Thailand, July 26, 2017. One thousand and sixty-six endangered species sea turtles, mostly green turtles and hawksbill sea turtles, were released into the sea as part of the conservation center's mission aimed to help preserve the habitats of sea turtles, their precious eggs, ocean environment and aquatic animals, and this year to also celebrate Thai King Maha Vajiralongkorn Bodindradebayavarangkun 65th birthday on July 28, 2017.

Tattoo Summer Sensation a one-week-old Shire horse at Tatton Farm, Knutsford, Britain, July 25, 2017. Shire horses are on the rare breed watch list with only 1500 left in the United Kingdom.

Tattoo Summer Sensation, a 1-week-old shire horse, stands next to her mother, Tatton Tabitha, at Tatton Farm, Knutsford, England, July 25, 2017.

A female Amur tiger cub Zoya, born on July 10, 2017, at the Philadelphia Zoo.

Squirrel monkeys eat fruit at Hefei Wildlife Park in Hefei, China, July 18, 2017. The zoo provided extra pools, air conditioning, fruits and ice cubes to help the animals cool off in the summer heat.

A newborn sea lion and the mother sit in their enclosure at the zoo in Duisburg, Germany, July 14, 2017.

Fiona, a baby Nile hippopotamus, born prematurely Jan. 24, 2017, swims outside for the first time with her father Henry, right, as her mother Bibi, left, watches in the pool of the zoo's Hippo Cove exhibit in Cincinnati. Hamilton County's sheriff and several deputies presented Fiona and her team of caretakers with a certificate naming the hippo as an honorary deputy sheriff, July 12, 2017.

A leopard cub is nursed by a 5-year-old lioness in the Ngorongoro Conservation Area in Tanzania, July 11, 2017.

A Tibetan antelope calf at the Changtang National Nature Reserve in Tibet in southwestern China, June 24, 2017. It is the antelopes' breeding season, and there are over 3,000 ewes that are pregnant or have newborns at the reserve, in the Qiuka region of Xainza County. The area is a wildlife paradise, with few humans, and is home to a variety of wildlife species and numerous lakes. More than 40 species of rare animals — including Tibetan antelopes, Tibetan wild donkeys, Tibetan yaks and black-necked cranes — live in the region.

A female hippopotamus, named Julka swims, with her one month old, as yet un-named calf, in Belgrade Zoo, Serbia, July 10, 2017. Hot weather has set in with temperatures rising up to 100.4 Fahrenheit in Belgrade.

A baby Sunda pangolin nicknamed "Sandshrew" feeds on termites in the woods at Singapore Zoo, June 30, 2017. Sandshrew was brought to the Wildlife Health and Research Centre on January 16, reportedly found stranded in the Upper Thomson area by a member of the public. Sunda pangolins are listed as critically endangered by the International Union for Conservation of Nature (IUCN). / AFP PHOTO / ROSLAN RAHMANROSLAN RAHMAN/AFP/Getty Images

A newborn bactrian camel (Camelus bactrianus) is nuzzled by her mother in their enclosure in the Nyiregyhaza Animal Park in Nyiregyhaza, 141 miles east of Budapest, Hungary, June 28, 2017. The baby was born weighing 33 lbs. and wearing white fur. Unlike Arabian camels, which have a single hump, Bactrian camels have two humps and are endangered.

An eight-week-old Yellow-headed Amazon, photographed at hobby parrot breeder Juergen Jentzsch in Leipzig, Germany, June 27, 2017.

Baby swallows wait to be fed at the old city in Vilnius, Lithuania, July 5, 2017.

Amur leopard twins Akeno and Zivon play in their enclosure after their christening at the zoo in Leipzig, Germany, July 6, 2017. The twin animals were born on April 22.

A Burchell's zebra foal stands behind its mother at Schoenbrunn zoo in Vienna, June 29, 2017. The foal of yet undetermined gender was born during the night from June 27 to 28 in the zebras' open-air enclosure.

A Barbary lion cub, stands next to its father "Schroeder" at the zoo in Neuwied, Germany, June 26, 2017.

Zokni (Socks), an alpaca foal who was born 15 days ago, rests in his enclosure in the Nyiregyhaza Animal Park in Nyiregyhaza, 141 miles east of Budapest, Hungary, June 15, 2017. The stallion baby has been named after the white fur on his legs.

A half-year-old kangaroo baby peeks out of the pouch of his mother at the Stralsund zoo, Germany, June 8, 2017.

A seven and half weeks old Siberian tiger cub lies in the grass as he is introduced to the public in the Debrecen Zoo in Debrecen, east of Budapest, Hungary, June 13, 2017.

The male cub is handfed by his keepers as his mother has no milk to feed him. He is the first Siberian tiger to be born in the Debrecen Zoo, June 13, 2017.

Little elephant bull Kitai and its mother Tong Koon stand in their compound at the zoo in Cologne, western Germany, June 8, 2017. Kitai was born last night.

A one-month-old one-horned rhinoceros, looks from inside a cage at the Assam state zoological park in Gauhati, India, June 5, 2017. Forest officials on Sunday rescued the male baby rhino believed to have been abandoned by its mother at the Pobitora wildlife sanctuary. The zoo officials have named the calf Raja.

A fourteen-week-old red kangaroo (Macropus rufus) peeps from its mother's pouch in their enclosure in Nyiregyhaza Zoo in Nyiregyhaza, Hungary, May 29, 2017.

A newborn white Siberian tiger cub is pictured in its enclosure at San Jorge zoo in Ciudad Juarez, Mexico, May 15, 2017.

A baby camel stands by its mother in the town of Guellala on the southern Mediterranean resort island of Djerba, on May 13, 2017.

One-day-old baby giraffe calf Gus looks at the camera at Noah's Ark farm, May 12, 2017, in Bristol, England. The baby giraffe was born May 11th at the zoo farm in North Somerset.

One-day-old baby giraffe calf Gus sits in his enclosure at Noah's Ark farm, May 12, 2017, in Bristol, England.

The ring-tailed lemur baby "Heather" drinks out of a miniature baby bottle at the Straussber Monkey Reserve in Straussberg, Germany, May 3, 2017. The baby lemur - probably born on 10 April, was abandoned by its mother and is now being taken care of by the head animal keeper, Silvio Dietzel, in an over-sized slipper and with a baby bottle.

A giraffe named April stands with her new calf at Animal Adventure Park in Binghamton, N.Y., April 15, 2017. Her birth was broadcast to an online audience of more than a million viewers.

A gray goose family search for food in Frankfurt, Germany, April 13, 2017.

Dasa holds her son Otis, born Feb. 1, 2017, in the orangutan enclosure at the Erie Zoo in Erie, Pa., April 12, 2017. The young orangutan was named after zoo officials received 6,000 suggestions in a monthlong contest.

A young male orangutan named Otis is held by his mother, April 12, 2017, at the Erie Zoo in Erie, Pa. The orangutan, born Feb. 1, 2017 was named after zoo officials received 6,000 suggestions in a recent contest.

A 12-day-old camel looks back at a visitor at the Veszprem Zoo in Veszprem, Hungary, April 12, 2017.

A little monkey stands next to its mother on a sunny warm spring day, at the zoo in Gelsenkirchen, Germany, March 30, 2017.

An adult lemur cradles its baby in Vienna, Austria, March 20, 2017.

The little sloth bear can be seen with its mother Kaveri for the first time at the zoo in Berlin, on March 27, 2017.

Mother polar bear Giovanna with her 4-month-old, Quintana, at the Hellabrunn Zoo in Munich, March 23, 2017.

A 3-month old Bennett's wallaby sits in its mother's pouch in their enclosure at Nyiregyhaza Animal Park, March 23, 2017, in Nyiregyhaza, Hungary.

A manatee baby swims near his mother at the ZooParc de Beauval in Beauval, France, on March 15, 2017, 11 days after his birth.

Ramboora the koala and his mother, Iona, on March 8, 2017, in a zoo in Duisburg, Germany.

The elephant Tuffi celebrates its first birthday at the zoo in Wuppertal, Germany, March 16, 2017. Tuffi received a fruit cake for the occasion.

Sandhill cranes as seen during a practice round prior to the Arnold Palmer Invitational Presented By MasterCard at the Bay Hill Club and Lodge, on March 15, 2017, in Orlando, Fla.

One of five cheetah cubs explores its outdoor enclosure for the first time in Beekse Bergen Safari Park, Hilvarenbeek, the Netherlands, March 9, 2017. The five cheetahs were born on Feb. 1, 2017.

Inkosi, a white Transvaal lion, plays with his 2-month-old triplets in their outdoor enclosure for the first time in the Nyiregyhaza Zoo in Nyiregyhaza, Hungary, March 7, 2017. Binti, Inkosi's mating partner since 2015, gave birth on Jan. 8.

A Rhodesian giraffe stands in front of two other herd members, Feb. 10, 2017, in Zambia.

A baby crocodile lizard at the State Museum of Natural History (Staatliches Naturkundemuseum) in Karlsruhe, Germany, on Feb. 24, 2017. Nine of the endangered lizards hatched at the museum in October 2016.

Giraffe calves seen in the Savannah House of Budapest Zoo in Budapest, Hungary, Feb. 23, 2017. The zoo currently boasts nine giraffes, the latest a calf named Sauda, born on the first of January, shortly followed by the birth of twins on Feb. 15, 2017.

Five cubs from cheetah Kate in Safaripark Beekse Bergen, Hilvarenbeek, the Netherlands, Feb. 21, 2017. The five were born on Feb. 1, 2017.

A baby cotton top tamarin clings to a tree branch at Wildlife Reserves Singapore, Feb. 15, 2017.

Baby giant pandas play on a tree at the Chengdu Research Base of Giant Panda Breeding in Chengdu, China, Jan. 22, 2017.

Murchison, a baby Rothschild giraffe (R), follows his mother Tula (L) from the Giraffe House at Chester Zoo in Chester, north-west England, on Jan. 19, 2017, as he steps out for the first time.

A newborn, yet unnamed polar bear baby in Berlin. The bear was born in November 2016 and will be presented to the public in March.

Kashtan, an Amur tiger cub, is being hand-raised by staff at the Milwaukee County Zoo, Dec. 12, 2016. He had an infection when he was about a month old and was separated from his mother so medical staff could care for him. He was gone for about a month, and zoo officials didn't know whether the mother would take him back and didn't want to risk his health or safety.

Chester Zoo is celebrating after a rare breed of giraffe was born on Boxing Day, Dec. 27, 2016, in Chester, United Kingdom. The Rothschild's calf, who would have fallen more than 6 ft during its birth, is the product of Chester Zoo's endangered species breeding program. The Rothschild's giraffe is one of the worlds most at risk animals due to poaching and habitat loss, with experts estimating numbers of less that 1,600 left in the wild.

A elephant mother pushes her as-yet unnamed daughter in an enclosure at the zoo in Hanover, Germany, Dec. 28, 2016.

Twin Panda cubs Fu Feng and Fu Ban at their indoor enclosure at the Vienna Zoo after their latest weighing, in Vienna, Austria, Dec. 30, 2016. The two cubs were exploring their entire enclosure for the first time on Dec. 29, 2016, the Vienna Zoo said in a media release.

A four-day-old baby mantled guereza (Colobus guereza) peers out of its mother's lap in the Nyiregyhaza Animal Park in Nyiregyhaza, Hungary, Dec. 28, 2016.

The newborn bottlenose dolphin Dobbie swims with her mother Pepina in the Dolphinarium at the zoo in Duisburg, Germany, Dec. 15, 2016. Little Dobbie was born three month ago and visits her dolphin family at the big pool for the first time after she could leave quarantine.

A female baby Rothschild giraffe (Giraffa camelopardalis camelopardis) in her enclosure in the Zoo in Opole, Poland, on Dec. 14, 2016. The baby giraffe, born on Dec. 8, 2016, still does not have a name, which should start with the ninth letter of the alphabet 'I' because she is the ninth giraffe born in Opole Zoo. The Rothschild giraffes is one of the most endangered distinct populations of giraffes.

The Tiergarten Schoenbrunn zoo in Vienna, Austria, shows a baby sloth eating some salad as it hangs on it's mother's belly in their enclosure, on Dec. 13, 2016.

Giant panda twins Ya Lun, left, and Xi Lun at the Zoo Atlanta, in Atlanta, Dec. 9, 2016. The names were revealed at a naming celebration on Dec. 12, their 100th day of life, in accordance with Chinese tradition. The zoo says Ya means elegant and Xi means happy. Lun is a reference to the cubs' mother, Lun Lun.

A four-month-old white lion cub cuddles to its father Sam inside their enclosure at a zoo in Tbilisi, Nov. 30, 2016.

A baby macaque rests in mother's lap at the Tbilisi Zoo in Tbilisi, Georgia, Nov. 15, 2016.

A newly born seal pup is seen on the sand dunes of the Lincolnshire Wildlife Trust's Donna Nook nature reserve near Grimsby, England, Nov. 8, 2016.

A five-day old zebra calf stands with her mother after she was released in an enclosure for public viewing at the Alipore Zoological Garden in the Indian city of Kolkata, Nov. 8, 2016. This is the first successful assisted birth of a zebra at the zoo.

Giant Panda twin cubs which were born on Aug. 7, 2016, are seen in this handout photograph dated October 27, 2016 at Schoenbrunn Zoo in Vienna, Austria.

A newly born critically endangered eastern black rhino walks in its enclosure at the zoo in Dvur Kralove, Czech Republic, Oct. 27, 2016. The female baby was born on Oct. 12, 2016, and is yet to be named.

A 2-day-old male baby Asian elephant stands next to his mother, Tamara, in their enclosure at the Prague Zoo, Oct. 9, 2016, in the Czech Republic. According to the zoo, it is the third elephant birth in the Prague Zoo's history.

A tiny otter at the Rehabilitation Center of Protected Animals in Przemysl, Poland, Oct. 7, 2016. The otter will receive medical treatment and then it will be released.

This undated handout photo received from the Australia Zoo on Sept. 19, 2016, shows Shayne, a nine-month-old orphaned baby koala who has found solace cuddling a fluffy toy koala in the absence of his dead mum, as he recovers from the trauma of her death.

Tian Bao, a 3-month-old baby panda, is officially named at the Pairi Daiza animal park, on Sept. 15, 2016, in Brussels.

A five-month-old baby female Bornean orangutan (Pongo pygmaeus) sits on her mother Sulli at Bioparc Fuengirola in Fuengirola, near Malaga, southern Spain, Sept. 12, 2016.

A five-month-old baby female Bornean orangutan (Pongo pygmaeus) plays with her mother Sulli at Bioparc Fuengirola in Fuengirola, near Malaga, southern Spain, Sept. 12, 2016.

A five-month-old baby female Bornean orangutan (Pongo pygmaeus) plays with her mother Sulli at Bioparc Fuengirola in Fuengirola, near Malaga, southern Spain, Sept. 12, 2016.

Baby giraffe of Niger "Kenai," born on Aug. 25, 2016, kisses his mother "Dioni," on Aug. 31, 2016 at the zoo of La Fleche, northwestern France.

Two male Amur leopard cubs leave their enclosure as they venture outside for the first time since being born at Marwell Zoo in Hampshire, United Kingdom, on Aug. 31, 2016.

Ignoring the shrieks of his rowdy, wrestling classmates, baby orangutan, Otan, practices swinging alone at his "jungle school" on Borneo island, at the International Animal Rescue centre outside the city of Ketapang in West Kalimantan, Indonesia, Aug. 4, 2016.

Meet Solo, the adorable Malayan tapir calf who has been taking her first steps outside at Chester Zoo, on Aug. 3, 2016 in Chester, England.

A female tero bird and its chicks are seen during Argentina's football team training session in Ezeiza, Buenos Aires, on Aug. 30, 2016.

Two male Amur leopard cubs leave their enclosure as they ventures outside for the first time since being born at Marwell Zoo in Hampshire, England, Aug. 31, 2016.

Baby "Embe" watches the public from her mothers arms at Taronga Zoo, on Aug. 12, 2016 in Sydney.

A gorilla named Kira, holds her newborn baby in an enclosure at the Moscow Zoo, on Aug. 11, 2016.

This handout picture taken on Aug. 15, 2016, by the Tiergarten Schonbrunn zoo in Vienna, shows a video grab of panda mother Yang Yang holding her twins.

A litter of white lion cubs is presented in their enclosure in the 'XII months' private zoo in the Demydiv village, about 50 kilometers north of Kiev, Ukraine, Aug. 11, 2016.

A young chimpanzee practices on a ball at the zoo in Frankfurt, Germany, Aug. 5, 2016.

Female elephant baby Tamika walks besides her 15 years old mother 'Tana' in their enclosure at the zoo in Halle, Germany, Aug. 5, 2016.

Gorilla Kira holds her baby at Moscow's zoo in Russia. The baby was born on July 22 and she's already living with her mother and other gorillas.

A penguin dives in its pool at the zoo in Frankfurt, Germany, Aug. 5, 2016.

White lioness Cleopatra pets one of three newly born lion cubs in Tbilisi Zoo, Georgia, Aug. 3, 2016. Triplet cubs of a rare breed of white lion have been born in Tbilisi zoo. It is the first addition to the lion family since the devastating flooding in 2015 that killed almost half of its inhabitants.

Little elephant Tamika plays with water in its enclosure at the zoo in Halle, Germany, July 22, 2016. The young elephant girl was born on June 26, 2016 and its name means "little sweet."

A newly born Mexican gray wolf cub, an endangered native species, interacts with his mother at its enclosure at the Museo del Desierto in Saltillo, Mexico, July 19, 2016.

Two baby seals fighting for a fish in the breeding tank of the seal station in Friedrichskoog, Germany, July 11, 2016.

A young emperor tamarin (Sauginus imperator) clings onto its mother in their enclosure in Sosto Zoo in Nyiregyhaza, Hungary, 11 July 2016.

A female white lion cleans one of her cubs in their outdoor enclosure at the Zoo Safari in Swierkocin, Poland, June 27, 2016. Four white lion cubs were born in March 2016.

A giant panda Hao Hao holds her newborn baby in her mouth at the park in Brugelette, Belgium, June 2, 2016.

A livestock assistant holds three micro pigs at Finkley Down Farm in Andover, England, May 19, 2016

A Bengal tiger cub (Phantera Tigris), which was born 13 days ago, is seen at the Zoo Mangkang in Semarang, Java Central, Indonesia, on May 8, 2016.

Ducklings at a poultry-farm during the first flock repopulation, due to the avian flu in the region, on May 13, 2016, in Toulouzette, France.

A newborn orangutang rests on his mother's chest on May 7, 2016, one week after his birth at the Amneville zoo, France.

A ring-tailed lemur and its babies are seen at the zoo in Cottbus, Germany, on May 11, 2016.

With widely open beaks, young robins wait in their nest for their parents to feed them on May 9, 2016 in Wiesbaden, Germany.

Mother giant panda Aibang is seen with her newborn cub at a giant panda breeding centre in Chengdu, China, May 6, 2016.

A white lion cub is presented and weighed during a press event at the zoo in Magdeburg, Germany, May 6, 2016.

Two young sloth bear cubs play in their enclosure at a zoo in Leipzig, Germany, May 5, 2015.

Jambi, A Siamang Gibbon, nurses her baby at the safari park and zoo, May 4, 2015, in Ramat Gan near Tel Aviv. The baby is reported to have been born about a month and a half ago, unkown to the zookeepers as the monkeys live in thick brush and the newborn was ensconced in his mother's fur.

A polar bear cub makes a debut in the pool with the mother Rara at the Sapporo Maruyama Zoo, April 28, 2015, in Sapporo, Japan. The baby polar bear, whose name has not been decided, was born on December 21, 2014.

Young red river hogs tried out their teeth on solid food at the San Diego Zoo Safari Park, April 21, 2015.

A gosling rests on its mother's back, April 15, 2015, in Santa Clara, Calif.

A gosling peers out from its mother's wings, April 15, 2015, in Santa Clara, Calif.

A one-month-old jaguar cub looks out from a bucket at the Leningrad Zoo in Saint Petersburg, Russia on April 15, 2015.

An infant western lowland gorilla makes its public debut at the Bronx Zoo, April 15, 2015.

Tuah, the 5-month-old Bornean orangutan looks on in the Great Ape Building at Utah's Hogle Zoo in Salt Lake City, April 10, 2015. A handful of animal keepers at Salt Lake City's Hogle Zoo found themselves with a tiny red-headed charge when Eve, a Bornean orangutan, died a few weeks after giving birth. Now 5 months old, the 14-inch, 11-pound Tuah is starting to crawl. Tuah was revealed to the public on Saturday, with visitors -- some of whom wore &quot;I met Tuah&quot; buttons -- lining up around the ape building to catch their first glimpse.

Katie the giraffe gave birth Friday, April 10, 2015 at the Dallas Zoo and the baby appears to be doing well.

Katie the giraffe gave birth Friday, April 10, 2015 at the Dallas Zoo and the baby appears to be doing well.