Photo taken on September 19, 2015 shows a baby Brazilian opossum at the “Parque Estoril” zoo in Sao Bernardo do Campo of Sao Paulo, Brazil. According to local press, the “Parque Estoril” zoo houses currently 23 orphan cubs of wild animals rescued in the south region of Sao Paulo, victims of illegal wildlife trade or problems caused by urban growth. According to the zoo, all the animals arrived in the last three months, and many of them, not being able to be reintroduced to their natural habitat, will be used as examples in environmental education classes. (Photo by Rahel Patrasso/Xinhua via ZUMA Wire)

Sasha Muir and Margaret Davidson sit in a car as some of the 30 barbary macaques, known as the Middle Hill Troop after living between the top of Gibraltar rock and the town, show what happens when motorists forget to lock their luggage compartments, as Scotland’s only monkey drive-through section opens at Blair Drummond safari park in Stirling, Scotland on October 8, 2015. (Photo by Andrew Milligan/PA Wire)

A mouse rides on the back of a frog in floodwaters in the northern Indian city Lucknow June 30, 2006. (Photo by Pawan Kumar/Reuters)

A veterinarian kisses an 8-month-old cat, wearing a prosthetic two-wheel device, at a veterinary hospital in Chongqing municipality, March 16, 2015. The cat's rear legs lost the abilty to walk after falling from the ninth to fifth floor of a building last November, its since undergone four major surgeries which included removing parts of its organs, local media reported. (Photo by Reuters/China Daily)

Murad Khydyrov, horse and monkey trainer at the Great Moscow State Circus, and chimpanzee named Micky get ready for a rehearsal of the show called “History” as the circus prepares for its new season, which is to begin on September 19, in Moscow on September 17, 2020. (Photo by Natalia Kolesnikova/AFP Photo)

Hamish the polar bear tries out his new enclosure at the Yorkshire Wildlife Park at Branton, Doncaster on November 6, 2020, after moving from the Highland Wildlife Park in Scotland. Hamish was the first polar bear to be born in the UK. (Photo by Danny Lawson/PA Wire Press Association)

A physically disabled fox walks with its walking wheels wheelchair, developed by an animal lover by Van Yuzuncu Yil University Wildlife Conservation and Rehabilitation Center, after the fox found wounded in the urban countryside in Van, Turkey on December 05, 2020. The fox also received a physical treatment at the center. (Photo by Ozkan Bilgin/Anadolu Agency via Getty Images)

A Goodfellow's Tree Kangaroo joey with its mother at Sydney Zoo in Australia on January 22, 2021. The 28-week-old male joey, who is yet to be named, has only just begun to pop his head and shoulders out of his mum's pouch. (Photo by Taronga Zoo via Reuters)