The week in wildlife

A great grey owl looks on from its enclosure at Skansen zoo in Stockholm Photograph: Scanpix Sweden/Reuters

This picture, provided by the Wisconsin Department of Natural Resources, shows a mountain lion, also known as the cougar. It's only the second confirmed mountain lion in Wisconsin since the early 1900s. The cougar was wiped out in most of the eastern US a century ago. But the cats have been migrating back from the Black Hills of south Dakota into Minnesota and Wisconsin Photograph: AP

Leaves sprout from trees devastated by bushfires in February near the township of Kinglake, about 60km north of Melbourne. With little regrowth, the forecasted rain for the next week threatens a great deal of erosion with little to hold the topsoil to the hillsides Photograph: WILLIAM WEST/AFP/Getty Images

A dragonfly is seen settled over a rock near a little river in Tegucigalpa, Honduras Photograph: Gustavo Amador/EPA

A woman sits selling an eagle at a street corner in Ho Chi Minh City. Vietnam is a member of the Convention on International Trade in Endangered Species (CITES) but there are often reported cases of trafficking of wild animals including endangered species Photograph: Hoang Dinh Nam/AFP/Getty Images

A thrush and its young family nest in traffic lights in Leeds city centre, oblivious to the constant traffic Photograph: John Giles/PA

A fern is seen on the bank of river Mura near the village of Izakovci, in east Slovenia Photograph: Srdjan Zivulovic/REUTERS

A cattle egret flies from a tree top in the Cairo suburbs Photograph: Asmaa Waguih/Reuters

A bell flower is seen near the Atitlan Lake, 148km west of Guatemala City, Guatemala Photograph: Ulises Rodriguez/EPA

Zebras are seen in the Masai Mara game reserve. Populations of ungulates have fallen in Kenya's Masai Mara reserve because of increased human settlement around the unfenced park. Giraffe numbers are down 95% Photograph: Antony Njuguna/Reuters

A beekeper points to the queen bee, marked red. The UK government has announced a £10m project to research the threats faced by bees and other insect pollinators Photograph: Darren Staples/Reuters

A baby kangaroo named Tijana is seen in the incubator in Belgrade zoo. Her mother, after being scared by an emu, ran away and six-month-old Tijana fell from the pouch Photograph: Srdjan Ilic/AP

Workers plant mangrove trees at a conservation garden in Jakarta to mark Earth Day Photograph: Dadang Tri/Reuters

Blossom on a tree, Hoxne, Suffolk. Small traditional orchards could vanish from the British landscape by the end of the century unless action is taken to save them, environmental experts and campaigners have warned Photograph: Graham Turner/Graham Turner