This winter’s annual Western Monarch Count was the third lowest on record. Scientists say habitat loss, climate change and ...

Ungulate migration has fascinated people for millennia. In the Western United States, ungulates such as elk, bison and mule ...

Population growth from people moving into Texas from other U.S. states has slowed to a 20-year low, according to new census ...

Chileans want more restrictive laws for unauthorized migrants and the imposition of prison sentences, according to the latest ...

The U.S. experienced negative net migration in 2025 for the first time in at least half a century, according to a report released by the Brookings Institution.

There’s more to bird migration patterns than meets the eye. Learn when and how birds migrate and discover which species makes ...

California's most devastating wildfire—the 2018 Camp Fire, which killed 85 and destroyed nearly 19,000 structures—forced ...

New data shows Washington has topped 8 million residents. International migration drove most of the gains, though net ...