Birds have always been an early warning system for our environment–the “canary in the coal mine.” It was the decline in bird species high on the food chain that tipped us off to the dangers of DDT and other chemicals. More recently, high altitude and high latitude birds are demonstrating the first definitive effects of global change. If science had been more advanced in the 1800s, the extinction of the Passenger Pigeon could have served as a warning about habitat destruction. This not just about protecting the birds–although that is a worthy goal–but all of these threats will ultimately reach the human race.