Melbourne Zoo's new Asian elephant receives a nudge from her mother after going on display to the public for the first time on February 10, 2010. #

A five-month-old baby female Bornean orangutan plays with her mother Sulli at Bioparc Fuengirola in Fuengirola, near Malaga, southern Spain, on September 12, 2016. #

Lisimba, a two-month-old Hamlyn's monkey, is pictured with its mother, Karmina, on August 2, 2012, at the zoo in Mulhouse, France. #

An unnamed baby Goodfellows Tree Kangaroo joey, peeks out from its mother's pouch on February 24, 2014, in Sydney, Australia. #

A baby hippo swims under the water near its mother Maruska in their enclosure at Prague Zoo, Czech Republic, on February 24, 2016. #

A newborn baby flamingo reaches up for its mother in its enclosure at Munich's zoo Hellabrunn on August 8, 2008. #

A three-week-old female White Rhinoceros runs with her mother Tanda, 21, at the Ramat Gan Safari, an open-air zoo near Tel Aviv, on September 3, 2014. #

A picture taken on March 15, 2017, shows a manatee baby swimming underwater near his mother in the manatee tank of the Zoological parc of Beauval on March 15, 2017. #

A piglet sleeps as it lays between the legs of its mother at the agriculture and food fair on its opening day in Saint Gallen on October 9, 2014. #

A grey seal pup and its mother lie on the beach near the Lincolnshire Wildlife Trust's Donna Nook nature reserve on December 5, 2016, in Louth, England. #

One-month-old endangered Bornean Orangutan sleeps on his mother Miri on March 6, 2013, in Singapore. #

A four-month-old red panda cub and its mother (right) rest on tree branches at Bratislava's Zoo on November 13, 2014. #

A female baby polar bear is fed by her mother on March 9, 2016, at the zoo in Bremerhaven, Germany. #