A male blue-winged warbler. Long-distance bird migration is one of the natural world's most inspiring phenomena-but the story of how we know what we know about bird migration is almost as amazing as ...

Each year around this time, an unfathomable parade of antelope travels across South Sudan. Now, after decades of war, the ...

The world’s largest animal migration and ocean gyres play vital roles in the global carbon cycle. Scientists went into the ...

Observed every year on April 25, World Penguin Day celebrates one of the most charming and resilient creatures on Earth. The ...

The winter months bring in colder weather in Arizona and, with it, a wave of animals that migrate through the Copper State. The snow and cold temperatures in places near Flagstaff and Pinetop-Lakeside ...

Migrating animals have for a long time been tracked by recapturing tagged individuals. More recently, radio-telemetry, which requires an observer to physically follow the tagged animal, has been used.