"In the face of rapidly declining bird populations, read about the vast impacts birds have on ecosystems, food systems, and our mental health and what we can do to protect them"-- Birds are nature's essential workers, crucial members of ecosystems around the world. And they are disappearing. Since 1970, nearly 30 percent of all birds in the United States and Canada have vanished, due to city lights and tall glass skyscrapers; domesticated cats prowling...