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.
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.
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.
Fossa (Cryptoprocta ferox) at the Houston Zoo.
The fossa, Madagascar's largest predator, is a cat-like carnivore that eats everything from insects to lemurs. Because they are rare and elusive, scientists know very little about them, including how many there are.
Oophaga andresii is one of the newly described species of Harlequin poison frog.
With their jewel-like colours, Colombia's poison frogs are coveted by collectors. Does naming their species help protect them or make them a target for trophy hunters?
A Northern Spotted Owl in Oregon’s Deschutes National Forest.
AP Photo/Don Ryan, File
The Trump administration wants to step up logging, saying it will benefit wildlife by reducing forest fire risks. But wildfires create habitat for threatened Spotted Owls and many other species.
African elephant bull.
Cells that transmit nerve impulses in the part of elephants' brains responsible for functions such as learning and memory are structured differently from those of any other mammal.
The endangered Coquerel’s Sifaka lemur.
The endangered species list is over 90 000 and includes Madagascar's lemurs.
The endangered Sierra Nevada bighorn sheep.
As attempts to water down the Endangered Species Act have accelerated, public support for the act has stayed high. Then why do politicians keep trying to weaken the act?
Australia could sustain wild rhinos, but should it try?
Renaud Fulconis/International Rhino Foundation
Would you pay to see rhinos in Australia's savannas or forests? It's not as crazy as it sounds – and could help save collapsing rhino populations.
Koalas spend a large part of the day sleeping - while their digestive enzymes get to work.
The koala genome, published today, gives us new and valuable information to aid conservation of this marsupial. It identifies special genes that evolved to adapt the koala to its unique lifestyle.
Wollemi pines once covered prehistoric Australia.
Wollemi pines have survived for hundreds of millions of years. Once covering Australia, they now survive in a few isolated spots – but they're coming back in a big way.
For decades, state and federal governments have shed environmental budgets and staff. Now it's up to volunteers to fill the gap.
Male sage grouse at the Seedskadee National Wildlife Refuge, Wyoming.
The Trump administration is reopening a plan negotiated under President Obama to protect Western sage grouse. This could signal to states not to bother working together to protect other endangered species.
Wild bumble bees provide natural pollination for blueberries in North America.
Honeybees receive a lot of attention, but the first North American bee to be listed as an endangered species is a wild bumble bee. Wild bees are vital pollinators, and some are declining rapidly.
Panamanian golden frogs (
Atelopus zeteki) are listed as critically endangered, and may be extinct in the wild.
Chytrid fungus has caused a global "amphibian apocalypse," killing frogs worldwide. Now some appear to be evolving resistance – but a closely related fungus threatens newts and salamanders.
The imperilled Tapanuli Orangutan in northern Sumatra.
© Maxime Aliaga
A US$1.6 billion dollar dam in Sumatra threatens the recently discovered and desperately imperilled Tapanuli Orangutan.
Long-eared Myotis bat (
Myotis septentrionalis), photographed in Arizona.
Scientists often use animals and plants as indicators to assess whether ecosystems are polluted. Tracking bats, which cover wide areas and need clean water, could become a way to find potable water.
A Kemp’s ridley hatchling makes its way to the water on Padre Island, Texas.
During sea turtle nesting season, scientists collect data and assess how turtles are doing. But they know less about how plastic pollution, fishing and warming oceans are affecting turtle numbers.
Whoosa vicious helpful predator? You are! Yes you are!
Dingoes increase cattle yields, mountain lions reduce car crashes and vultures eat organic waste: like them or not, predators help humans.