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Photograph: Graeme Campbell/National Park Authorities

Glenridding by Graeme Campbell - one of the many great photos submitted to the national parks landscape photo competition

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Photograph: Sukree Sukplang/Reuters

Monkeys enjoying a cold bath during a hot day in Ayutthaya, Thailand. Nearby Bangkok is seeing the hottest average temperatures in the past 30 years - part of our environment site’s Week in Wildlife gallery.

Photograph: Gerry Ellis/Corbis

Koalas under threat in Australia - in pictures on our environment news pages

Behold! Britain’s rarest wild flowers

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Photograph: Jamal Nasrallah/EPA

A caterpillar lies on a wild flower at a farm at wadi Al-Sheta, west of Amman, Jordan - one of the stunning images in this week’s wildlife gallery from our environment team

Photograph: Marizilda Cruppe/Greenpeace

The controversial Belo Monte dam and hydropower plant in the Amazon - a gallery of its construction

The Belo Monte would be the third largest dam in the world, and the second largest in Brazil. It is expected to submerge as much as 400,000 hectares and could displace an estimated 20,000 people

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Emperor penguins become first creatures to be counted from space

The first census of an entire species using satellite images reveals double the number of the birds, meaning the impact of climate change can be monitored far more accurately

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