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Audubon celebrates recent actions but urges continued focus on the Delaware River Watershed.
The seasonal movements of birds have captivated humans for millennia. Now we know enough about their flights to make surprising connections.
The seasons are changing as the planet warms. Some migratory species may break under the strain—but others could surprise us.
Visiting or volunteering at one of these sites can provide up-close avian encounters and a chance to contribute to valuable data collection.
Researchers today can follow birds' paths as they fly thousands of miles. But it wasn't always that way. Scroll through more than two centuries of advances in understanding this natural wonder.