Humans are probably causing what ice ages and asteroids caused before them.
The Earth has experienced five periods of mass extinction. Scientists can't quite be certain yet, but they're fairly sure we're now well into the sixth.
Eastern-yellow robin. Some 60 per cent of the native birds of south-east mainland Australia have lost more than half of their natural habitat.
Graham Winterflood/Wikimedia Commons
Aside from their intrinsic value, common bird species might be one of the only ways we connect with nature in our everyday lives. But these opportunities are under threat.
Koalas are among the threatened native species worst affected by habitat loss.
A staggering 7.7 million hectares of critical habitat has been destroyed since environment laws were enacted - and 93% was not referred to the federal government for assessment.
Doug Ford’s government is weakening environmental laws in Ontario — leaving wildlife and environments with no protections.
Doug Ford's government is undercutting the environment by giving business and development the upper hand.
Camera trap image of adult female chimpanzee with her offspring in fallow area in Moyamba district of Sierra Leone foraging on oranges.
Tacugama Chimpanzee Sanctuary
Studies show that West Africa's critically endangered chimpanzees are finding ways of adapting to their rapidly changing habitat, but they still remain highly at risk.
Is the black-throated finch getting the legal protection it deserves?
AAP Image/Eric Vanderduys
Just one out of a possible 775 development approvals was refused on the basis that it would harm the southern black-throated finch, despite this endangered species being protected by federal law.
Woolly monkeys are hard to miss in Colombia’s jungles. Now, they face extinction.
Colombian researchers hope to revive an endangered species by rehabilitating monkeys confiscated from smugglers. The captive animals' struggles show that survival is not guaranteed.
A kangaroo finds refuge in a small patch of vegetation surrounded by a new housing estate.
Expanding cities and farmland have created many small, often isolated patches of vegetation. Long seen as having limited ecological value, a new study shows these are vital for endangered species.
The burrowing owl was once a common sight on the prairies. Now Saskatchewan and Alberta have fewer than 1,000 breeding pairs.
Carving up ecosystems or opening them to development puts the survival of species at risk.
Like many migratory songbirds, tree swallows are experiencing population declines in parts of their breeding range.
Effective conservation of migratory songbirds requires an understanding of how populations are connected between seasons. The challenge is being able to track individuals throughout the entire year.
Eyes in the sky: drone footage is becoming a vital tool for monitoring ecosystems.
Deakin Marine Mapping Group
Ecology is in the midst of a technological revolution. From tiny sensors that can be fitted to animals, to swarms of remotely-piloted drones, researchers have a host of new ways to study the natural world.
Tundra swans, which nest in the Arctic and migrate south in fall, alight at Mattamuskeet National Wildlife Refuge in North Carolina.
The Interior Department is narrowing protection for migratory birds to cover only deliberate harm such as hunting, but not threats like development or pollution that kill millions of birds yearly.
Sudden droughts are bad news for political stability worldwide.
A new international report makes for bleak reading on the state of the world's soils. It predicts that land degradation will displace up to 700 million people worldwide by mid-century.
A giant swallowtail butterfly feeds from the flower of an alternate-leaved dogwood.
We're in the middle of an Insectageddon. But a garden of native plants can help insects, as well as birds and other wildlife.
Koalas are stressed out by a range of pressures, from habitat loss to dog attacks.
Ever feel so stressed you can't carry on? You're not alone - koalas have a similar problem, and hundreds are being rescued by veterinarians each year.
This quenda seems to have been a victim of land clearing.
More than 50 million birds, mammals and reptiles are thought to be killed each year in New South Wales and Queensland by the removal of native vegetation, and planning laws are failing to protect them.
Are we in the middle of a mass extinction caused by Homo sapiens? Past events can help us to understand the current crisis.
Land reform is thought to have caused the cheetah numbers to fall by 85% in Zimbabwe.
The land reform programme in Zimbabwe has come at the cost of wildlife and opens up the debate on people versus nature. But there is a way forward.
The birds commonly seen in urban backyards of Australia are increasingly introduced species like this house sparrow, sharing a birdbath with a native red-browed finch.
We all know how vital it is for our native bird species to thrive. But what if the only birds that visit your garden are introduced "pest" species? Many people feel these birds deserve some love too.
When species are pushed to the top of the mountain, where else is left to go?
From luxuries like champagne to the very livelihoods of fishing communities in the developing world – the climate-driven shifts in species will affect us all.