The week in wildlife

A heron flies over Dojran Lake, 106 miles south of the Macedonian capital Skopje. The lake survived an ecological disaster after a drought and excessive use of its water, which caused levels to fall nearly 10 metres (33ft). Two rivers were re-directed to the lake and have restored the life to the lake Photograph: Ognen Teofilovski/Reuters

Baby anteater Benita rests on the shoulder of a zoo keeper in Berlin. Benita was born in December last year and is being bottlefed as her mother was not able to bring her up. She now weighs 3.3kg Photograph: Steffi Loos/AFP/Getty Images

A handout picture from the Smithsonian Institute portrays a prehistoric snake after fossils of the world's largest serpent were found in Cerrejon, Colombia. The fossils, weighing 1,143kg and dating back 60m years, indicate that the serpent was about 13 metres long Photograph: HO/AFP/Getty Images

Animals graze on wasteground close to the main British base at Basra airport in Iraq Photograph: Matt Cardy/Getty Images

A species of rain frog (Pristimantis genus) potentially new to science was discovered in the hills of Tacarcuna, Colombia. Ten new species of amphibians – including three kinds of poisonous frogs and three transparent-skinned glass frogs – have been discovered in the mountains of Colombia, conservationists said this week Photograph: HO/Reuters

A startled hippotomus dashes from his hiding place, Shire River, Liwonde National Park, Malawi Photograph: David Hobcote/guardian.co.uk

Budapest Zoo's 19-year-old polar bear, Lady, catches fish in her pool Photograph: Bela Szandelszky/AP

The Achaea catocaloides caterpillar is seen in this undated handout picture released this week. Liberia's agriculture minister said that caterpillars infesting villages, destroying crops and threatening food security of an estimated 350,000 people were of the Achaea catocaloides species. The species thrives in forest environments and eats all vegetation, including cocoa trees, which could be a threat to plantations in West Africa if the conditions remain conducive for reproduction Photograph: HO/REUTERS

A bighorn sheep is seen at the Wildlife Research and Conservation Centre in Toluca, Mexico. From the live snakes that smugglers stuff with packets of cocaine to the white tigers drug lords keep as exotic pets, rare animals are being increasingly sucked into Mexico's deadly narcotics trade. Following the lead of their Colombian counterparts, Mexico's flashy drug lords like to show off rarities like sea turtle skin boots and build ostentatious private zoos Photograph: Stringer/Reuters

A tree forest in Baruk in the mountainous Shouf area. Lebanon's majestic cedar trees have withstood the test of time for centuries but climate change is threatening them. Used by various civilisations throughout history for their strong and durable wood, Lebanon's cedars are now on the International Union for Conservation of Nature's Red List as a "heavily threatened" species Photograph: -/AFP/Getty Images

A painted stork (L) returns with a tree branch to make a nest on a tamarind tree at Mechirajupalli village in Warangal District, 200km from Hyderabad. Painted storks (mycteria leucocephala) are migratory birds which nest in the area from January till June Photograph: Noah Seelam*/AFP/Getty Images

New-born female hog deer named "Manja", 2 months, looks from behind it's cage at Malaysia's National Zoo in Kuala Lumpur Photograph: Bazuki Muhammad/Reuters

Wild boar should be allowed to regain their natural place in the UK's woodlands, the Wildwood Trust urged today as it welcomed the birth of three new piglets to its resident boar couple Photograph: Wildwood Trust/PA

Gulls fly over a snow covered field in the Scottish borders Photograph: David Cheskin/PA