Penguins are seen inside the ZSL London Zoo, on the first day of its reopening since lockdown restrictions ease, amid the coronavirus disease (COVID-19) outbreak, London, Britain on December 2, 2020. (Photo by John Sibley/Reuters)





A leopard tires to hide in a residential area of Guwahati, India, 30 November 2020. According to officials a leopard, which was in search ​of food in Guwahati, has been tranquillized and rescued by Guwahati zoo. (Photo by EPA/EFE/Stringer)





A robin sits on a holly branch at the RSPB's Loch Leven nature reserve, on December 2, 2020 in Kinross, Scotland. (Photo by Ken Jack/Getty Images)





Canada geese line up along the Wissahickon creek, Wednesday, December 2, 2020, in Philadelphia. (Photo by Matt Slocum/AP Photo)





Undated photo issued by the International Union for Conservation of Nature, showing Tucuxi (Sotalia fluviatilis) dolphin. A report published Thursday December 10, 2020, by International Union for Conservation of Nature (IUCN), highlights that all four known freshwater dolphin species including the tucuxi dolphin in the Amazon river system, are now threatened with extinction. (Photo by Fernando Trujillo/IUCN via AP Photo)





Goldfinches fly over a field of sunflowers and bushes in northern Saxony on December 2, 2020. The birds of the finch family spend the winter in large groups and roam around in search of food. (Photo by Sebastian Willnow/dpa)





A swan makes a careful landing on the frozen rowing lake on a frosty and foggy morning at Nene Park in Peterborough, Cambridgeshire, United Kingdom on December 7, 2020. (Photo by Paul Marriott/Rex Features/Shutterstock)





View of Arlequin toads (Atelopus) at the Jambatu Center for Amphibian Research and Conservation, in San Rafael, Ecuador on November 9, 2020. In plastic or glass boxes, with litter, water or rocks – according to the needs of each species – the Jambatu Center reproduces 34 varieties of toads in captivity, whose populations have decreased dramatically due to the increase in temperature and changes in the conditions of humidity. (Photo by Rodrigo Buendía/AFP Photo)





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)





Starlings flying in a tight flock over Nafplio, Peloponnese, southern Greece, 03 December 2020. (Photo by Bougiotis Vangelis/EPA/EFE)





This handout photo taken and released on December 1, 2020 by the Cambodia Wildlife Sanctuary shows newly arrived Asian elephant Kaavan (L) touching trunks with another elephant in his new enclosure at the Kulen Prom Tep Wildlife Sanctuary in Cambodia's Oddar Meanchey province. (Photo by Pedro Vella/Cambodia Wildlife Sanctuary/AFP Photo)





A female Coeligena helianthea hummingbird flies up to the flower in in The Paramuno corridor on Monserrate hill in Bogota, Colombia on November 25, 2020. (Photo by Luisa Gonzalez/Reuters)





Eleven-day-old baby orangutan of Sumatra named Mathai is held by its mother Sari at the Pairi Daiza wildlife park, zoo and botanical garden in Brugelette, Belgium on December 9, 2020. (Photo by Yves Herman/Reuters)





A monkey drinks from a packet of milk in front of the Prang Sam Yod temple during the annual Monkey Buffet Festival in Lopburi province, north of Bangkok on November 29, 2020. (Photo by Jack Taylor/AFP Photo)





A monkey eats vegetables in front of the Prang Sam Yod temple during the annual Monkey Buffet Festival in Lopburi province, north of Bangkok on November 29, 2020. (Photo by Jack Taylor/AFP Photo)





An Oriental Darter (Anhinga melanogaster) tosses up its catch of a small fish at a lake outside Putrajaya, Malaysia, on Sunday, November 29, 2020. (Photo by Vincent Thian/AP Photo)





A rescued Burmese python peeks out of a monk's robes at a monastery that has turned into a snake sanctuary on the outskirts of Yangon, Myanmar, November 26, 2020. (Photo by Shwe Paw Mya Tin/Reuters)





A crocodile with a motorbike tyre around its neck is seen in a river in Palu, Central Sulawesi province on December 7, 2020, months after Australian television presenter and crocodile expert Matthew Nicholas Wright failed to trap it to remove the tyre. (Photo by Muhammad Rifki/AFP Photo)





Undated photo issued by the International Union for Conservation of Nature, showing European bison. Climate change is now the biggest threat to natural World Heritage, according to a report published Thursday December 10, 2020, by IUCN, although it also showed the more promising revelation that populations of the European bison, Europe’s largest land mammal, have improved. (Photo by Rafał Kowalczyk/IUCN via AP Photo)





River gulls stand on a rope that ties a closed raft restaurant at the bank of the Sava river in Belgrade, Serbia, Monday, November 23, 2020. After reporting thousands of daily new cases of infections in the country of 7 million people, authorities have warned that the health system has been overburdened with hospitals running out of beds. (Photo by Darko Vojinovic/AP Photo)





A newborn cygnet hides under its mother's wing to keep warm at honghe Wetland scenic spot in Tengzhou City, East China's Shandong Province, November 22, 2020. (Photo by Costfoto/Barcroft Media via Getty Images)





Great white pelicans eat fish provided by Israeli farmers at a water reservoir in the Emek Hefer valley, north of Tel Aviv, on November 27, 2020. An estimated 50,000 pelicans stop off in Israel during their annual migration from the Balkans to Africa, where they enjoy a mild winter before returning to Europe. They rest and feed for weeks, causing chaos for fish farmers, whose outdoor commercial pools and reservoirs provide rich pickings. Farmers have tried to deter them with loudspeakers, laser beams and by firing blank rounds from rifles. In their desperation, they have come up with another way: offering the birds a free lunch. (Photo by Menahem Kahana/AFP Photo)