The week in wildlife

Harbin, China: A mink takes a stroll in the snow after escaping from a cage at a mink farm. China is the world's largest exporter of fur clothing. More than 90% of its fur garments are shipped to overseas markets, according to industry data Photograph: Diego Azubel/EPA

Mumbai, India: Children fish on the shores of the Arabian Sea Photograph: Arko Datta/Reuters

Oakland, US: Cormorants sun themselves on a breakwater at Lake Merritt, home to large populations of herons, egrets, geese and duck. It is the oldest wildlife refuge in North America Photograph: Ben Margot/AP

Los Angeles, US: A hummingbird feeds Photograph: Gabriel Bouys/AFP/Getty Images

Singapore: American bullfrogs at the Jurong Frog Farm Photograph: Tan Choon Huat/Reuters

Nuremberg, Germany: A Humboldt penguin (Spheniscus humboldti) dives in his pool at the zoo Photograph: Timm Schamberger/AFP/Getty Images

Hanover, Germany: Hippopotamus Chimala peers out of the water in her enclosure Photograph: Nigel Treblin/AFP/Getty Images

Stuttgart, Germany: Wilbaer looks out of his pool at Stuttfgart zoo. Wilbaer, who is the first polar bear born and reared in the zoo, had his first birthday on December 10. Next year, he is supposed to move to a zoo in Sweden Photograph: Michael Latz/AFP/Getty Images

Sipadan, Malaysia: A scuba diver approaches a swirling school of giant barracudas Photograph: David Loh/Reuters

Glastonbury, UK: Sheep in a field as the winter sun rises over mist and frost in fields close to the town Photograph: Matt Cardy/Getty Images

Bhubaneswar, India: Dew drops condense on a spider's web on a cool morning Photograph: Biswaranjan Rout/AP

Islamabad, Pakistan: Two sheep fight as they are displayed for sale ahead of the Muslim holiday Eid al-Adha Photograph: Emilio Morenatti/AP

Northern Ireland: Irish pork was removed from sale in Europe and Asia in Monday because pig feed contaminated with dioxins had been discovered. Nine farms in Northern Ireland have also been identified as having used the toxic pig feed Photograph: Peter Muhly/AFP/Getty Images

Gardens and heathlands across the UK are under threat from two new plant diseases. The newly arrived disease, Phytophthora ramorum, claims a magnolia in Trengwainton Garden, Cornwall. Unless action is taken against the two strains of Phytophthora, or sudden oak death, it could be in every garden within 20 years and have a severe impact on native plants and species in woodlands and heathland Photograph: NTPL/PA

Yaan, China: Giant pandas play in their pen at the Bifengxia Research Centre Photograph: China Photos/Getty Images

Athens, Greece: A stray dog crosses a street during a night of riots Photograph: Aris Messinis/AFP/Getty Images