A groundbreaking study reveals that North American bird populations are declining most severely in areas where they should be thriving. Researchers analyzed 36 million bird observations shared by ...

By combining data on all known bird species, this tree is the most impressive snapshot yet of one of Earth’s most ...

From small to vast ranges, species diversity grows unevenly. With a shrinking planet and climate change, biodiversity is shaped for years.

A study published in Science reveals that North American bird populations are declining most severely in areas where they ...

New maps released this week document the world’s largest land mammal migration, revealing the seasonal journeys of more than ...