A few dozen birdwatchers gathered in the predawn darkness to wait for the moment when thousands of migrating snow geese stopped honking and preening to suddenly take flight from a Pennsylvania ...

The Pennsylvania reservoir was built a half-century ago to attract waterfowl, and over the years the gaggle has grown.

Tens of thousands of snow geese are pushing north from winter staging and stopover areas, and new public tracking data is helping researchers map where migrating geese travel and how high they fly. A ...