The annual odyssey of migratory birds is unique, spectacular, fascinating. It is also fraught with danger, not just from poachers and hunters and the new threat called climate change, but from us too – people who wouldn't want any harm to come to these creatures. The newest nemesis for these birds is our insatiable need for energy. Hundreds of thousands of birds die annually from electrocution the world over, and tens of millions of birds from collision with power lines alone. Just as the...