The week in wildlife - in pictures

Turtles enjoy the sun in a pond at Guwahati in Assam, India. Assam roofed turtles are an extremely rare species, found in the Brahmaputra-Meghna drainage in Assam and parts of eastern Bangladesh Photograph: Manas Paran/Barcroft India

A swan enjoys some sighteeing on the Charles Bridge in Prague Photograph: Michal Cizek/AFP/Getty Images

Autumnal colours are reflected in the water as a fisherman rows his boat during a sunny day at the Sylvenstein barrier lake, Germany Photograph: Michael Dalder/Reuters

Argentinian green parrots at Manzanares Park in Madrid, Spain. After being introduced as pets in the early 1980s, those which escaped or were abandoned have proliferated so rapidly that the city has authorised the capture and extermination of any specimen Photograph: Jorge Sanz/Demotix/Corbis

A North American beaver eats fallen leaves at the Smithsonian's national zoo in Washington DC Photograph: Xinhua/Landov/Barcroft Media

A flock of common cranes flies towards its night roost near the village of Linum, Germany. The area north of Berlin has become the biggest staging point for migrating cranes in central Europe, where up to 80,000 cranes roost for several weeks on their way from their breeding grounds in Scandinavia, eastern Europe or Russia to their wintering grounds in western Spain Photograph: Thomas Krumenacker/Reuters

A new endangered species of poison dart frog was discovered during a 2013 study to determine the impact of tourism on biodiversity in a tract of rainforest known as 'the Lost World' in Guyana. The thumbnail-sized frog, one of 441 new species found in the Amazon, was discovered near Turu Falls, a waterfall at the foot of the Iwokrama Mountains, and has been given the Latin name Allobates amissibilis meaning 'that may be lost', because it thrives in an area that could soon be opened up to tourism Photograph: Philippe Kok/WWF

African elephants leave a watering hole after bathing in the Etosha national park, north-west Namibia. The park, home to hundreds of species of mammals, birds and reptiles, spans an area of 22,270 square kilometres and gets its name from the Etosha salt pan Photograph: Gao Lei/Xinhua Press/Corbis

Fallow deer lock antlers during rutting season in Phoenix Park, Dublin Photograph: Niall Carson/PA

Veterinarians operate on a Galapagos green turtle (Chelonia mydas agassisi) to extract a fishhook from its oesophagus in San Salvador, El Salvador Photograph: Jose Cabezas/AFP/Getty Images

Snow geese take flight in Richmond, Canada. The annual migration is a picturesque sign of the season in Canada. However, more than 10,000 snow geese flying from the north has become a major pest problem that has grown out of control Photograph: Imago/Barcroft Media

A monkey opens a tap to quench their thirst on the terrace of a hotel in New Delhi, India. Monkeys often make their way into the capital's bustling markets, snatching bags, food or whatever they find from commuters. Local authorities say they are helpless when it comes to dealing with monkeys Photograph: Aarabu Ah Sultan/Barcroft India

Two northern gannets fly over the waves as a fishing trawler makes its way along the coast off Calais, northern France Photograph: Pascal Rossignol/Reuters

An orangutan named Hang Lipo sits inside a blood collection centre at the Bukit Merah island foundation in Perak, Kuala Lumpur Photograph: Samsul Said/Reuters

A Magellanic penguin at the Punta Tombo reserve in Chubut, Argentina. The reserve was created in 1979 to protect the largest continental colony of Magellanic penguins, where nearly 400,000 gather to breed Photograph: Xinhua /Landov / Barcroft Media

The Sanggan River canyon in Xuanhua county, north China's Hebei province Photograph: Yang Shiyao/Xinhua Press/Corbis

A man herds his yaks through the snow in Tsenkher Sum, Arhangai province, Mongolia Photograph: Mareike Gunsche/Reuters

A lion yawns as it rests along a road in the jungles of Bannerghatta national park, south of Bangalore, India. The 25,000-acre park is home to panthers, lions, tigers, and a large variety of birds Photograph: Aijaz Rahi/AP