Researchers were able to show that over hundreds of thousands of years, the gentoo penguin has diverged into four distinct evolutionary lineages.

Runners complete the same lap every hour for as long as they can — sometimes for days. The brutal format has become surprisingly popular.

At the center of a widening crisis for one of the nation's great wildlife comebacks is a fish most Americans would hardly recognize.

Leica’s retro designs have survived various crises, but its playbook may not work for everyone.

The largest analysis of bat genomes and fossils suggests that the first bats emerged in Europe roughly 65 million years ago and that echolocation evolved early.

My father dedicated his life to studying the Indigenous group, and they may soon allow unprecedented development through their land. I went on a trek through the jungle to find out why.

Call them fat. Call them corpulent. Call them rotund. The bears are back in town and bigger than ever.

“This is kind of just a once-in a-lifetime experience,” said marine researcher Annsli Hilton.

Birds are drawn to lights, and more than a billion die each year after crashing into buildings, experts said.

The Philadelphia pigeon tour was intended to be a one-time event, but demand has kept it going, despite a few pigeon poop mishaps.

Traditionally found in warm climates, like the American Southwest, armadillos have been migrating farther and farther north, researchers say.

Tribes and scientists are mounting an urgent trapping effort to keep European green crabs from devastating a corner of Puget Sound.

In “The Ghost of the Mountains,” Kulbhushansingh Suryawanshi proves there is no substitute for old-fashioned field study.

This natural beauty is not to be missed.

Cutting-edge tracking is illuminating the migratory journeys of warblers and dozens of other species at a scale not previously possible for small birds.

Here’s some bad news: Sometimes the coyote does win.

Five decades after a graduate student’s rescue plan that people had scoffed at, a thriving ecotourism economy has taken flight along the coast.

I thought a feeder would help my ailing sister stay connected to the world. Others had the same idea.

The rescued pug, who likes to dip her protruding tongue into the food bowls of everyone at home, emerged as the winner of the World’s Ugliest Dog Contest on Friday.

Reflections — and expert tips — on building bonds with corvids.

The Florida grasshopper sparrow is one of the nation’s rarest birds. A research team is working to bring them back from the brink.

The Mississippi kites’ 50-foot-high nest has drawn a stream of awestruck observers.

Enlisting nature to help purify the Reflecting Pool could be more patriotic and successful than tossing in more chemicals.

The wave took people, rangers and birds by surprise. But how are they doing a couple of weeks later?

Known for playing stoic noblemen, actor Sean Bean brings a peaceful presence and a love of birds to his new role as host of the podcast Get Birding.

B6 the bar-tailed godwit offers puffed-up humans a lesson in humility.

Two sandhill cranes performed a dance spectacle in a park in De Leon Springs, Florida, on September 1. The two birds whirled exuberantly across the meadow, as if locked in a dance-off with one another...

Bird-watching is now a wide-spread pastime for young people who appreciate the hobby's "quasi-pagan" roots.