The week in wildlife

Four-month-old tiger cubs at Bergzoo in Halle, Germany. A woman visiting the zoo earlier saved one of the cub's lives after the tiger cub lost consciousness when a piece of meat got stuck in his throat. The woman deployed mouth-to-mouth resuscitation on the cub Photograph: Waltraud Grubitzsch/EPA

Snow covered sheep in a field near Castleside, County Durham, UK Photograph: Owen Humphreys/PA

Lola, a domestic cat, reaches under her enclosure at the animal sanctuary in Sacramento, California. Lola is one of many pets abandoned or surrendered to county shelters after their owners suffered home foreclosures Photograph: David Paul Morris/Getty

Camels drink at the Darmeer Boob borehole near the town of Allay Baday in Somaliland. About 1,000 camels come to the borehole each day, each returning for another drink after about 15 days. Water supply is one of the biggest problems in this region. Photograph: David Levene/freelance

Blue tits in a nest. Feeding birds in the winter not only helps them survive the coldest months; it can also boost their ability to breed more successfully in the spring, scientists have said Photograph: PA

A man buys goats and sheep in a weekly market in the outskirts of Guwahati, India. Fears over bird flu have prompted the Assam government to put a ban on importing poultry products from other states. This has led to a surge in livestock prices across north-east India Photograph: EPA

Whipsnade Zoo's newest Asian elephant calf with mother Azizah at the Bedfordshire wildlife conservation park. Video Photograph: Steve Parsons/PA

With full bellies house mice get comfortable in a freshly hollowed loaf of bread at a zoo in Tokyo. This is the year of the mouse (also rat) in the Asian zodiac Photograph: Kennedy Brown/EPA

Female polar bear cub Flocke, who is now seven weeks old, plays in front of a mirror at Nuremberg zoo in Germany Photograph: Ralf Schedlbauer/AFP

An iguana dozes on a branch at the Straubing zoo in Germany. The South American iguanas can reach a length of 2m Photograph: Armin Weigel/EPA

Runners and riders compete on the frozen lake at St Moritz, Switzerland Photograph: John Wire/PA

A white tiger cub with its mother Luna at the Metropolitan National Park zoo in Santiago, Chile. Luna gave birth to her cub in December Photograph: Claudio Reyes/EPA