Every winter, a marvelous spectacle occurs as hundreds of thousands of butterflies travel south across Taiwan in one of the world’s most rare migrations.

For a few fleeting weeks each winter, the famously elusive cats emerge from solitude, calling across the mountains in search of a mate.

For a few fleeting weeks each winter, the famously elusive cats emerge from solitude, calling across the mountains in search of a mate.

Between 1998 and 2009, John Mitani witnessed 18 murders firsthand, and found circumstantial evidence for three more. But no police were ever called, for these killers were all chimpanzees, from the ...

Some species are at their most active in winter, whether they’re flying, feeding, or mating. From elephant seals in ...

The endangered big cats are hanging on in Russia, the first country-wide survey of the animal suggests, while scientists and ...

Decades ago, India’s tigers were on the brink of extinction. Slowly, their numbers have rebounded. But that ecological success has prompted a dire problem—and a race to save many of them from genetic ...

A natural experiment in a national park in Patagonia shows how the return of a large predator can reshape an ecosystem. Long absent from Argentinian Patagonia due to over-hunting, pumas have returned ...

Rare attacks helped brand the cassowary as deadly, but habitat loss and human activity now pose a far greater threat to the bird’s survival. A southern cassowary stands on a beach at Etty Bay in ...

The Smithsonian’s National Zoo and Conservation Biology Institute is home to more than 2,200 animals across its campuses in D.C. and Virginia. The zoo was the first in the United States to hire a ...

Gordon Burghardt kept a lion cub named Meg in his home at the behest of the Knoxville Zoo. To help Meg get out some energy, Burghardt and his wife would often play with Meg in their wooded, unfenced ...

Climate change is speeding the spread of global pathogens. Can an early-warning system for animal viruses help stop pandemics before they start? During an expedition to the Southern Ocean, microbial ...