The week in wildlife

Week in wildlife: Wildfire in Angeles National Forest, Los Angeles, US

A rabbit flees the Big Tujunga Canyon, during the fourth day of the fires that burned more than 20,000 acres of the Angeles National Forest Photograph: KPA/Zuma / Rex Features/KPA/Zuma / Rex Features

Week in wildlife: A Sumateran Orangutan at Bukit Tiga Puluh National Park in Jambi, Indonesia

A Sumatran Orangutan (Pongo abelii) behind a cage at Bukit Tiga Puluh National Park in Jambi, Indonesia. There are only around 6,600 of this endangered species left in the wild Photograph: Oscar Siagian/Getty Images

Week in wildlife: Alligators along the banks of the Tachas River, Rio de Janeiro, Brazil

Alligators on the banks of the Tachas River in Recreios dos Bandeirantes, Rio de Janeiro. Alligators live in the river between two municipal parks, feeding on birds, fish and small mammals Photograph: Ricardo Moraes/AP

Week in wildlife: Australian Crested Pigeon Ocyphaps lophotes

The Australian crested pigeon. Biologists have discovered that the species has a secret way of alerting fellow birds to predators – a "whistle" emitted by flapping their wings when it takes off in alarm. This photo was taken from the Royal Society website Photograph: HO/AFP/Getty Images

Week in wildlife: Wild elephants at Deepor Beel wildlife sanctuary, Gauhati, India

A herd of wild elephants relax in a marshy area of Deepor Beel wildlife sanctuary, Gauhati, India. The herd had come down from the forest to the mainland in search of food Photograph: Anupam Nath/AP

Week in wildlife: Brown bears in a pond at the Alaska Wildlife Conservation Center, US

Brown bears play in a pond at the Alaska Wildlife Conservation Center in Portage Glacier, Alaska. The centre rehabilitates injured and orphaned animals found in the area, to release them back into the wild Photograph: Saul Loeb/AFP/Getty Images

Week in wildlife: undersea life on the Norfolk coast, UK

A snake pipefish photographed by two recreational divers, Rob Spray and Dawn Watson, who have snapped an array of undersea life on the Norfolk coast Photograph: Rob Sprayand Dawn Watson/Norfolk Wildlife Trust/PA

Week in wildlife: First Day Of Spring Arrives In Australia

A crimson rosella eats flower blossoms on the first day of spring in Canberra, Australia Photograph: Mark Kolbe/Getty Images

Week in wildlife: a white rhino released at Nairobi National Park

Kenya Wildlife Service rangers and officials release a female white rhino at Nairobi National Park after drought hit their original habitat Photograph: Thomas Mukoya/REUTERS

Week in wildlife: Aspen trees with sudden aspen decline or SAD in Colorado

Aspen trees show the effects of "sudden aspen decline" or SAD in Colorado. The white-barked trees with golden leaves that gave their name to the famed ski resort have been dying off across the Rocky Mountain states. The phenomenon is puzzling but some foresters point to climate change Photograph: HO/Reuters

Week in wildlife: South Africa Spring Day flowers

Flowers enjoy some warm sunny weather on Spring Day in Johannesburg, South Africa Photograph: Kim Ludbrook/EPA

Week in wildlife: Conservationists attempt to bring back rare lizard

A male (right) and female sand lizard. Hundreds of the UK's rarest lizard are being reintroduced to several areas across England and Wales Photograph: Amphibian and Reptile Conservati/PA

Week in wildlife: Wet weather A submerged tree in Lake Ullswater in the Lake District

A submerged tree in Lake Ullswater in the Lake District. The level of the lake had risen due to rain water coming down from the surrounding hills after northern parts of England were hit by heavy rain and high winds Photograph: Dave Thompson/PA