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 ...

It's early morning in the San Gabriel Mountains and we're standing in an unremarkable dirt parking lot. The hills around us are dotted with chaparral vegetation, and Los Angeles sprawls just south of ...

Every spring, a remarkable sight unfolds in the San Gabriel Mountains north of Los Angeles, as thousands of songbirds fly north. It is really early in the morning here, like, way too early for me. The ...