If birds left tracks in the sky ... while European herring gulls fly overhead. Near the fishing village of Roses, Spain, seagulls form a dreamy tableau as they chase a boat for scraps.

Radar tracking allows you to follow along to see what birds are flying overhead as the birds move to their summer feeding grounds. "The movements are massive," said Andrew Farnsworth, a migration ...

From the beach near Area 3, the morning sunlight caught on snow and ice among Lake Ontario’s waves. Dotted among the white spots were birds bobbing amid the tide or flying overhead: redheads ...