Two-thirds of Earth’s large lakes have decreased in volume over the past three decades.
Asmall group of innovative researchers cracked the secret of bird migration—and then set about applying that knowledge to save birds from the hazards of city lights.
Thedetailed record of bird sightings and phenological observations around Concord, Massachusetts—from Thoreau’s notes 170 years ago to today’s studies by scientists at Boston University—provides a key to studying how climate change is affecting bird migration.
How Do Cooper’s and Sharp-shinned Hawks Coexist in Backyards? FeederWatch Investigates