In the ocean's twilight zone, where the reach of the Sun fades to nothing, an epic migration begins every time night falls. It could also have an outsized effect on our climate.
Every year, millions of straw-coloured fruit bats descend on Zambia's little-known Kasanka National Park, creating one of Africa's most extraordinary wildlife spectacles.
Bird flu is decimating wildlife around the world and is now spreading in cows. In the handful of human cases seen so far it has been extremely deadly.
Once pushed to the brink of extinction by overfishing, bluefin tuna has experienced a spectacular rebound in recent years. But can it survive the onslaught of climate change?
Humpback whales have been making a conservation comeback – but warming seas are putting their recovery at risk.
Marine turtles spend almost their entire lives at sea – but little is known about the paths they take. Now, satellites are helping scientists map their movements.
The destruction a fire brings can be crucial for certain species to thrive. Meet the conservationists reviving the ancient art of "good fire".
As the Earth's rivers warm, salmon must either struggle to survive in a degraded habitat or move to cooler waters – but native Alaskan fishing practices are helping protect them.
South Africa's sardine run is a spectacle to behold as thousands of predators feast on sardine mega-shoals – but climate change and over fishing are putting it at risk.
