One of three newborn white Bengal tiger cubs is pictured with its mother in La Pastora Zoo in the municipality of Guadalupe, Mexico, April 25, 2019.

A newborn rhinoceros stands next to its 6-year-old mother Keren Peles at the Ramat Gan Safari Zoo near Tel Aviv, Israel, Aug. 24, 2015.

A newborn Rothschild's giraffe is seen inside its enclosure at Liberec Zoo in Liberec, Czech Republic, Nov. 6, 2019.

Rotem, a sand cat, is pictured with her 3-week-old cubs at the Safari in Ramat Gan, near Tel Aviv, Israel, Aug. 18, 2015.

A 1-month-old Mexican wolf cub plays next to one of its parents in Chapultepec Zoo in Mexico City, Mexico, June 25, 2019.

Walrus Dyna and her unnamed calf, born on June 17, 2018, in the Hagenbeck Zoo, are seen in their compound as they are presented to the public in Hamburg, Germany, Aug. 3, 2018.

A western lowland gorilla baby named "Mjukuu" rides on the back of its mother "Mbeli" in their enclosure at Taronga Zoo in Sydney, Australia, May 19, 2015.

A baby elephant is seen near its mother Surin at an outdoor facility of the Copenhagen Zoo, Denmark, Oct. 7, 2020.

Giant panda mom Mei Xiang (top) pins her cub Bao Bao during a wrestling match in the snow at the Smithsonian National Zoo in Washington, D.C., U.S., Jan. 27, 2015.

A polar bear cub snuggles up against her mother Valeska, in their enclosure at Bremerhaven's (Bremen's) Zoo by the Sea, Germany, March 9, 2016.

A lioness plays with her cub at a zoo in Sarajevo, Bosnia-Herzegovina, Oct. 10, 2014.

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

One of the two female Asiatic lion cubs that were born during the COVID-19 lockdown is seen with their mother Sajani inside their enclosure at the Bioparco zoo in Rome, Italy, July 9, 2020.

A 5-month-old baby female Bornean orangutan plays with her mother Sulli at Bioparc Fuengirola in Fuengirola, near Malaga, southern Spain, Sept. 12, 2016.

An Egyptian fruit bat pup suckles from its mother during an interview with Reuters at a laboratory in the Steinhardt Museum of Natural History in Tel Aviv, Israel, May 27, 2019.

Orangutan Theodora and her daughter Java are seen at the zoo of the Jardin des Plantes in Paris, France, June 13, 2019.

A newly born albino red-necked wallaby joey is carried by its mother in their enclosure at the zoo in Decin, Czech Republic, March 13, 2019.

A newborn chimpanzee baby holds its mother's toe in its mouth at the Sao Paulo Zoo, in Sao Paulo, Brazil, Jan. 17, 2020.

A newborn ring-tailed lemur clings to a branch at a zoo in Rome, Italy, May 30, 2019.

A guereza monkey jumps with a newborn baby at Prague Zoo, Czech Republic, April 5, 2018.

A 1-week-old baby bonobo clings to its mother at Planckendael zoo in Mechelen, Belgium, Aug. 9, 2017.

A 10-day-old male rhinoceros calf walks next to its mother "Kumi" in their enclosure at the zoo in Berlin, Germany, Oct. 24, 2014.

"Debbie," a 56-day-old dolphin calf, swims next to her mother "Delphi" at the zoo in Duisburg, Germany, Feb. 17, 2016.

Newborn Barbary lion cubs sit near their mother "Khalila" inside their enclosure at Dvur Kralove Zoo in Dvur Kralove nad Labem, Czech Republic, July 8, 2019.

White rhino "Tanda" and its 2-month-old female calf "Ushindi" are seen at the Lewa Savanne enclosure at Zoo Zurich, as the COVID-19 outbreak continues, in Zurich, Switzerland, July 9, 2020.

A newborn female Asian elephant calf (far R) walks next to a 1-month-old elephant in their enclosure at the Prague Zoo in Prague, Czech Republic, May 13, 2020.