Conservation

Predatory fish are now largely absent from coral reefs but they could be successfully reintroduced at 'super-sites'.

Wildlife tagging helps research and conservation but could have unintended negative effects.

Extinct species being brought to life may not be such a good idea, some scientists have argued.

Larger marine animals are expected to starve first as the seas warm and food scarcity increases.

The Angolan dwarf Galago is three times bigger than its close relatives.

Results have been questioned for using out-of-date data.

Dusky dolphins have been filmed playing with kelp and rubbing flippers.

Despite revised estimate of green turtle populations, their number is steadily growing

BBC investigation looks at how rangers in north-eastern India shoot poachers to protect rhinos.

The clues the penguins use to find food are no longer fitting in warmer, over-fished seas.

A large genetic study of black rhinos has yielded new clues about how their populations could be better managed.

Conservation team moved 16 bison from a protected herd in Alberta to Panther Valley, where they remain under observation until summer 2018.

2,500 animals of the critically endangered species have died in an outbreak that began in livestock.

A young dolphin washes up on a beach in Devon. Here's how two marine biologists investigate its death.

New population of Dryas monkeys has been found in remote part of the Congo Basin.

One orangutan loved the game so much she accidentally smashed the screen.

There are more bears than previously thought living in one of the most visited site in South America.

There are only about 360 Saimaa ringed seals left, which are found at a single lake in Finland.

Adelaide Zoo staff who cared for Karta through her surprise pregnancy are devastated by her loss and that of her baby.

There are less than 100 specimens each left of these critically endangered species.

There are less than 60 vaquita porpoises left in the wild and it may be difficult to catch any to protect them.

We are likely to lose the majority of primate species to extinction in the coming decades.

Hairy-legged bat was thought to feed only on bird blood, but human disruption of its habitat made it change tack.

The enormous Cuvette Centrale peatland holds about 30 billion tonnes of carbon.

Cold-loving birds are losing their habitats, but some butterflies are thriving.

Adult oncillas can weigh as little as 1.5kg, and are sensitive to the nature conservancy status of their habitat.

He didn't come into office as a climate crusader, but Obama has made strides in tackling climate change.

It's not known whether Adélies snack on the gonads as a delicacy or are being driven to unusual food sources by a changing habitat.

A snake with an iridescent head – likened to Ziggy Stardust – is among one of many newly discovered species.

Some animals were vulnerable to historic climate change, while other populations actually increased.