For thousands of years, millions of monarch butterflies have migrated from the northern U.S. and Canada to Mexico for the winter. But exactly how they know where to go is still a mystery.

Scientists have recently mapped the painted lady butterfly's annual flight from equatorial Africa to northern Europe and back ...

Hummingbird Central has released an interactive migration map so birdwatchers can keep track of when these tiny travelers ...

Picture an animal that spends its youth in winding rivers, only to vanish across entire oceans on a secret journey for which ...

A recent study in Sweden's Dal River reveals that pharmaceutical pollution, specifically anti-anxiety medication, ...

Imagine looking up at the sky on a crisp autumn evening, only to witness a swirling river of birds soaring overhead—thousands ...

April is in full swing, which means it's time for spring showers, blooming flowers and beautiful melodies coming from your ...

From Mexico to the mountains, Arizona’s hummingbirds are on the move. Here's when and how to spot them in Arizona.