The week in wildlife

A pair of ospreys - one male, the other female - roost at Loch of the Lowes wildlife reserve in Dunkeld, Scotland. The UK's oldest breeding female osprey, which returned to the reserve last month for the 20th consecutive year, has produced her 56th egg and the first of the breeding season
Photograph: Jeff J Mitchell/Getty Images

Llamas graze in a valley at the base of the Sajama, an extinct volcano, and the highest peak in Bolivia at 6,500m
Photograph: DAVID MERCADO/REUTERS

A pair of brown mouse birds feed on guava fruit in Nairobi, Kenya
Photograph: Sayyid Azim/AP

Mangroves at Baie D'Ambodi-Vahibe, Madagascar. More than one in six mangrove species worldwide are in danger of extinction due to coastal development and other factors, according to the first-ever global assessment on the conservation status of mangroves carried out by the Global Marine Species Assessment
Photograph: Sterling Zumbrunn/IUCN

Marine life near the Douglas Shoals area of Australia's Great Barrier Reef, affected by the Chinese bulk coal-carrying ship Sheng Neng 1, which ran aground on 3 April 2010. Clumps of oil have spread over about half a mile of beach, marine safety authorities said
Photograph: Gbrmpa/AFP/Getty Images

A black-footed rock wallaby. Australia has declared a huge swath of land – more than twice the size of Luxembourg – a conservation zone to help protect the endangered rock wallaby. The leaders of the Anangu Pitjantjatjara Yankunytjatjara said 580,000 hectares (2,240 square miles) of the remote land near the vast country's centre would now be managed by its traditional owners for conservation
Photograph: Michael Pedersen/AFP/Getty Images

A rare sighting of a clouded leopard, which spends most of its time in trees, was captured on camera by researchers in Indonesia. The photo was taken in a forest area called Sipurak, part of Kercini Seblat national park, Sumatra, Indonesia
Photograph: Wai-Ming Wong/Chester Zoo

A bee collects nectar from a flower
Photograph: Ali Jarekji/Reuters

A researcher checks a plastic bucket with a trigger fish trapped inside after finding it floating in the Sargasso Sea, north Atlantic Ocean. Researchers are warning of a new blight on the North Atlantic Ocean: a swirl of confetti-like plastic bits, bottle caps and other refuse stretching for thousands of square miles
Photograph: Marjolijn Dijkman/5 Gyres/AP

A lion looks through dry brush at the Tsavo West national park in Kenya. Kenya's lion population has been dropping by an average 100 lions each year since 2002, the Kenya Wildlife Service announced last week, warning that the big cats could be extinct in the next two decades. Habitat destruction, disease and the rising human population also played a role in the drop from 2,749 lions seven years ago to the current 2,000
Photograph: Roberto Schmidt/AFP/Getty Images

Scientists from the Canary Islands have compiled data on wild ferrets in La Palma and the damage they cause in the ecosystem, to confirm that the island is the one with the highest number of naturalised animals in the archipelago
Photograph: Keven Law/Keven Law

Illegally logged timber, which has been confiscated, is floated down the Guam river delta in Brazil
Photograph: Stringer/Reuters

A seal colony rests in a cove close to where seal pups were released by the Animal Care Team from the National Seal Sanctuary on 13 April 2010 in Cornwall. On average the sanctuary rescues up to 50 pups a year but aims to rehabilitate all of them back to the coast
Photograph: Matt Cardy/Getty Images

An osprey snatches a trout out of the water. The wildlife photographer Mark Hancox waited for seven hours in a cramped hide on the shores of Loch Garten, Scotland, before the bird caught its prey
Photograph: Mark Hancox/ SWNS

Meerkats fight at Twycross zoo
Photograph: Owen Humphreys/PA

A yellow-bellied marmot pokes its head through a hole in the asphalt in Montana
Photograph: Zack Clothier / Rex Features/Zack Clothier / Rex Features

A butterfly lands on a dandelion during the warm weather in Derbyshire on 13 April 2010
Photograph: Owen Humphreys/PA