The week in wildlife

Hamburg, Germany: Ring-tailed lemurs play with a Halloween pumpkin in Hagenbeck zoo Photograph: Uwe Wilkens /EPA

Seosan, South Korea: A flock of wild geese fly at sunset Photograph: Kim Jae-Hwan /AFP

Ya'an, China: A keeper holds a giant panda cub in an incubator at the China giant panda protection and research centre Photograph: China Photos/Getty

Kent, UK: A green heron, native to north and central America, was spotted on West Hythe's royal military canal last weekend. The bird, which has not been seen in the UK since 2005, is believed to have been blown across the Atlantic while migrating along the east coast of North America Photograph: Gareth Fuller/Press Association

Duisburg, Germany: Chickens peck corn under the surveillance of African elephants Photograph: Volker Hartmann /AFP

Boston, US: Little, a Chihuahua who won best in show at the second annual "howl-oween" Photograph: Lisa Poole/AP

Madrid, Spain: Spanish shepherds take part in the annual sheep parade through the heart of Madrid. The sheep are en route to winter pastures in southern Spain Photograph: Juan Medina/Reuters

Nepal: Hindu devotees worship a cow as part of the Tihar festival, also known as the festival of lights Photograph: Narendra Shrestha/EPA

London, UK: A black swan on the lake in St James's Park Photograph: Alessia Pierdomenico/Reuters

Nara, Japan: A Japanese deer looks on at Nara Park Photograph: Dai Kurokawa /EPA