The massive annual spring migration of America's birds – millions of them – is underway. Here's how to follow along at home.

After the lights turn green again, the birds fly away and vehicles drive ... they probably noticed cars driving over nuts fallen from a walnut tree overhanging a road. The crows already knew ...

Peak bird migration is about to start in Colorado and around the country. Here are tools for tracking and identifying the ...

he was struck by the Field's collections of over half a million birds. "I suddenly had access to all these modern birds, and it made me wonder, 'What happens when a bird loses the ability to fly?'" ...