Bighorn sheep on grassland in Yellowstone National Park, Wyoming.
North America's prairies once were home to millions of wild animals. Today, most of that land is farmed or developed, but some grasslands have never been plowed and could be rewilded.
A toucan eating a fruit in the tropical wetlands of the Pantanal, Brazil.
In the absence of animals to help larger trees reproduce, forests are suffering.
Native red squirrels are being outcompeted by invasive grey squirrels.
Scott M Ward / shutterstock
Major new 'State of Nature' report shows wildlife numbers still falling but conservation measures can work.
As the world warms, male ladybird spiders are hatching too early in the year to meet a mate.
MF Photo / shutterstock
Don't be afraid of spiders – be afraid for spiders
The Siamese Crocodile once lived in Southeast Asian freshwater rivers, but now fewer than 1000 individuals exist.
Fewer than 1,000 Siamese crocodiles exist, but can captive crocs survive again in the wild?
Rosa in the Sumatran Rhino (
Dicerorhinus sumatrensis) Sanctuary, Way Kambas, Sumatra, Indonesia.
Willem v Strien/Wikipedia
The world mourns the loss of Malaysia's last male Sumatran rhino. Can anything stop the slide of the species towards extinction?
A grassland earless dragon at Jerrabomberra, NSW, November 1991. The search is now on for this species’ Victorian cousin.
The Victorian grassland earless dragon may well be the first lizard species driven to extinction on Australia's mainland. But conservationists aren't ready to declare it dead just yet.
Caracals that feed on poisoned rodents in Cape Town pass the toxins onto their young through contaminated milk.
Household rat poison is endangering caracals, and other wildlife species in Cape Town, that prey on poisoned rodents. If not managed, this can negatively alter the region's ecosystem.
Photographic camps are more beneficial to communities than hunting.
Trophy hunting is not the solution to Africa’s wildlife conservation challenges. There are other ways.
Volodymyr Burdiak / shutterstock
In Europe, biodiversity is under threat. But three major trends mean we're still optimistic.
Botswana’s elephants are officially an economic asset.
Ian Sewell/Wikimedia Commons
At an international summit in Egypt this month, nations will hopefully make progress towards recognising the economic value of wildlife and other environmental assets.
surasak khankasikam / shutterstock
Conservation surveillance can generate fear and anger among local people.
A pod of narwhals (
Monodon monoceros) in central Baffin Bay. Narwhals are the most vulnerable animals to increased ship traffic in the Arctic Ocean.
Kristin Laidre/University of Washington
Climate change is shrinking Arctic sea ice and opening the region to ship traffic. Whales, seals and other marine mammals could be at risk unless nations adopt rules to protect them.
Simon Eeman / shutterstock
The WWF's report avoids the C-word – here's why that matters.
The Endangered Species Act was enacted in 1973 partly to help save the bald eagle, the U.S. national symbol, from extinction. Should public appeal influence which species get priority?
How should the US spend limited funds for conserving endangered species? A new data tool lets managers compare different strategies so they can allocate money to protect the most species.
Prince William in Laikipia, Kenya, on September 30, 2018.
Thomas Mukoya / EPA
A movement built on inequality can also perpetuate that same inequality.
Releasing a female wolf on Isle Royale, Oct. 2, 2018.
The National Park Service is moving wolves to Isle Royale in Lake Superior to replenish a small pack on the island. Wolves prey on moose, which are overgrazing the island. It doesn't hurt that they are charismatic.
Simon_g / shutterstock
Saving the rhino means tackling demand for its horn.
A wild dingo from the Great Sandy Desert, Western Australia.
The WA government has announced plans to reclassify dingoes as no different to wild dogs - paving the way for them to be culled at will. But dingoes are unique and deserve to be recognised as such.
Andy Rain / EPA
Data collected by zoos can help scientists model the populations of endangered species.