When we were kids we all learned that birds fly south for winter. Even though it was probably one of the first fascinating ...

A male blue-winged warbler. Long-distance bird migration is one of the natural world's most inspiring phenomena-but the story of how we know what we know about bird migration is almost as amazing as ...

CHOTEAU, Mont. — Each spring, near the tiny town of Choteau, Mont., population 2,000, the sky comes alive. Huge flocks of migrating geese, swans and other birds swoop in for a rest on their long ...