The week in wildlife – in pictures

Australian humpback dolphins leap from the waters off the coast of northern Australia Photograph: Guido J. Parra/AFP/Getty Images

A group of common myna birds and a cattle egret sit on top of a rhinoceros inside the Kaziranga national park, Assam, India Photograph: stringer/EPA

An tree frog in the Bijagua area of Costa Rica, 220km from San Jose Photograph: Jeffrey Arguedas/EPA

A gull lands in a pond in Phoenix park, Dublin Photograph: Niall Carson/PA

Pelicans silhouetted by a setting sun look for fish along the California coastline near Leucadia Photograph: Mike Blake/Reuters

Four bats on a branch in the Cuyabeno wildlife reserve in Ecuador Photograph: Xinhua/Landov/Barcroft Media

The rarely spotted single-tusk elephant, also called the Ganesh elephant, of Kaziranga national park Photograph: Stringer/EPA

An opossum attempts to play dead while hanging from a bin in Seadrift, Texas. The marsupials are known to feign death when threatened, but this youngster fooled nobody when it keeled over still clinging on by its paw Photograph: Nate Chappell/Barcroft Media

An Indian fritillary (Argyreus hyperbius) butterfly on a flower in Tokyo Photograph: Franck Robichon/EPA

Two female red panda cubs in their enclosure at Port Lympne Wild Animal Park near Ashford, Kent, as they make their public return after the recent bad weather Photograph: Gareth Fuller/PA

Young American alligators among mangroves in the Everglades national park in Florida. Everglades is the largest designated sub-tropical wilderness reserve on the North American continent Photograph: Zhang Jun/Xinhua Press/Corbis

Seagulls fly over the Bosphorus in Istanbul, Turkey Photograph: Bulent Kilic/AFP/Getty Images

A serval kitten yawns on the Masai Mara national reserve, Kenya Photograph: Paul Goldstein/Exodus/Rex Features

A one-month-old white baby rhino with her eight-year-old mother, Zola, in the Cabarceno wildlife park in Spain Photograph: Marina Cano / Barcroft Media

Greylag geese, native to the UK, land on the water at Slimbridge Wildfowl and Wetlands centre, Gloucestershire Photograph: Ben Birchall/PA

Migrant birds captured at dawn on the Izunuma pond, in Miyagi, Japan Photograph: The Asahi Shimbun via Getty Imag